World's Strongest Hero: Deku

by BookishTen8

Forcefully taken away from his world, Izuku Midoriya quickly comes to terms with the new one he finds himself in and eventually becomes the Number One Hero. As Deku continues to fight Villains and Mysterious Beings, he soon discovers that his old world hasn't forgotten him. OP Deku. One Punch Man World... for now.

2. Chapter 2

Author's Note: Still looking for Quirks to give to Deku so if you have any thoughts of a Quirk, PM me.

Izuku's Quirks:

1) One For All

2) Blackwhip

3) Float

4) ?

5) ?

6) ?

7) ?

Enjoy.

xXx

( City I - Hero Academy )

Within the confines of City I, there's an institute that is renowned for being the only place in the world where young men and women can go to train and study on how to be the next generation of Heroes. Every year, hundreds to thousands of young teens apply to the academy so they can spend the next three years of their lives, learning how to become the best Heroes they can be. Since the academy was only constructed three years ago, the current third year students will be the very first class to graduate from the academy.

The academy is famously known as Hero Academy.

Built and funded by the Hero Association, Hero Academy's main purpose is to train and guide students into becoming the next generation of Heroes to defend humanity from both criminals and Mysterious Beings. While anyone can still become a Hero by passing the Hero Certification Exam, Hero Academy offers its students the chance to become strong before they enter the dangerous world of Heroes. Another upside to joining Hero Academy is that once the students graduate after their three years of training and studying, they automatically earn their C-Class Hero ranking so they don't need to pass the Hero Certification Exam. Therefore, it only makes sense that every teacher in Hero Academy is an official Hero, even for non-heroic subjects like math and geography. Even the principal of Hero Academy is an official Hero, although he isn't just any Hero.

The principal of Hero Academy so happens to be the current S-Class Rank 1 Hero, Izuku Midoriya or Deku as he's more widely known as.

Right now, Izuku Midoriya can be found sitting in his office which is both large and simple in taste. Izuku is sitting on a comfy office chair from behind his desk, signing documents that help keep the school running without any trouble. On the opposite side of his desk, there are two comfy green chairs for anyone to sit on who so happens to visit his office, either they be professors or students. To the left of Izuku's desk is a bookshelf filled with books that range in everything from science textbooks to Hero biographies. To the right of Izuku's desk are three chairs surrounding a coffee table and overhead them is a flat screen television which he has on, but with the volume low so to not distract him from signing his paperwork.

Izuku nearly groans in frustration while signing another document. For the last ten years, he has defeated various criminal organizations and Mysterious Beings that could destroy whole cities and yet for some reason, signing form after form is enough to tire out even his near infinite stamina and patience. "Who's stupid idea was it to make the Hero Academy?" groaned Izuku, ignoring the several voices in the back of his head that reminds him that it was actually his idea.

The idea had actually came to him just a few months after the Hero Association was formed. While the world was lucky to have men and women of various strength and skill join up with the Hero Association when it first formed, there was only so much of them to patrol every city. Even then, most of the Heroes weren't capable of dealing with Dragon-level threats, like Vaccine Man or Mosquito Girl. At the moment, only the S-Class Heroes can actually handle the Dragon-level threats alone and right now, there are only sixteen of them.

That's why Izuku proposed the Hero Academy plan to the Hero Association. Just like with UA, Hero Academy is to train their students to not only become Heroes, but to be the best Heroes that they can possibly be. While the training can be grueling and not everyone can keep up, those who do have shown that they will be great Heroes when they graduate and get some experience on the field. From what Izuku can tell, the current third years who are the first students to enter Hero Academy have grown to the point where they can defeat most C-Class Heroes and even a few low rank B-Class.

Since he's the one who gave the idea, the Hero Association nominated Deku to become the principal to the school. The Number One Hero accepted with the only exception being that he runs the school how he sees fit. The last thing he wants is for the Hero Association to poke their noses where they don't belong.

Admittedly, Izuku did use some of his knowledge and experience from attending UA to help create the school, but he also implemented his own important features that UA was obviously missing. One such feature is that Hero Academy accepts any number of students, as long as they manage to pass the entrance exam. That means that unlike UA who only accept forty students and splits them into two classes, Hero Academy accepts dozens and splits them into several different classes.

While Izuku has no regrets in making the Hero Academy, the stack of paperwork that he needs to finish by the end of each day is starting to make Izuku regret accepting the position as principal.

"I see there is no time to rest when you're the Number One Hero" said a kindly voice from the doorway.

Izuku looks up from his desk and smiles when he sees Bang standing by the door. "Silver Fang, it's good to see you. How are your classes going?" he asked, waving a hand towards a seat in front of his desk.

Accepting the offer, the S-Class Rank 3 Hero takes a seat across from Izuku. "Those youngsters have too much energy for an old man like me. They're not perfect, but they're getting there. I'd say any of them could beat Charanko at this point" chuckled Silver Fang. The martial arts master happens to be a teacher for Hero Academy who teaches martial arts to the first, second and third years. Accepting the teaching role has also helped Bang find students other than Charanko to join his dojo as several students have joined up for further training, filling the dojo again ever since the incident

Silver Fang isn't the only S-Class Hero who works at Hero Academy as the S-Class Rank 11 Hero, Superalloy Darkshine teaches Physical Education to the students whenever he isn't busy with his Hero work.

"That's good to hear. Hopefully the next generation will be prepared for when we leave the world to them" sighed Izuku, feeling far too old for someone who's only twenty five.

Bang smiles, encouragingly. "They'll be ready. The third years I believe are more than ready to join C-Class and even B-Class once they gain some experience."

Izuku smiles, but stops when he sees the news channel on his television. Turning up the volume with the remote, Izuku listens as the newscaster speaks.

"We interrupt this programme with a breaking news bulletin. A large swarm of mosquitos has been sighted in City Z. Mummified remains of attacked farm animals have also been found. If you encounter a large swarm of mosquitos, it is strongly suggested that you flee immediately."

"City Z again? That city can't seem to take a break" said Silver Fang who turns back to see Deku getting up from his desk. "You're going to check it out?"

"It's obviously the work of a Mysterious Being. You think a regular swarm of mosquitos could do that?" asked the Number One Hero while pointing to his television which shows an image of dead cows which were attacked by the swarm of mosquitos. The mosquitos sucked out every last drop of blood from the farm animals, leaving them as dried up husks made up of only skin and bone.

Deku turns and opens the window behind his desk before stepping out, standing in midair thanks to his Quirk, Float. "I need to handle this swarm before it can do anymore damage."

"And it's a good enough excuse for you to ignore your paperwork" deadpanned Silver Fang who glances at the stack of paperwork on Deku's desk.

"Sorry, can't hear you. Off to save the day!" shouted Deku who immediately takes flight up into the air so to avoid Silver Fang's accusing glare.

( City Z )

With the swarm of mosquitos attacking anyone and anything with blood, a warning has been sent out by the Hero Association, requesting all the residents of City Z to evacuate the city at once. Most residents have already evacuated to safety, although some have decided to use the crisis to benefit themselves by looting the now empty city.

"Hahaha, thanks to that warning, they're all empty" laughed a thief who walks out of a house he just robbed. "Like someone's going to die from a mosquito bite" he smirked to himself before turning to his large bag of loot. "What's losing a little blood if I can walk away with all of this?"

A sudden gust of wind surprises the thief as his hat is blown right off his head and flies high into the air. "Was that the wind?" wondered the confused thief while looking back to see his hat being blown high into the air. With his back turned, the thief doesn't see the swarm of mosquitos flying towards him until they're already upon him.

"W-What the!" cried the thief as thousands of mosquitos swarm him. The thief panics and tries to bat away the mosquitos with his crowbar, but it does nothing as the mosquitos quickly begin sucking the blood out of him. The thief can only cry out in the middle of the deserted city while thousands of mosquitos suck up his precious blood. Within seconds, the blood-filled mosquitos fly off, leaving the now dead thief as a dried up corpse.

The swarm flies back to their Queen and transfers the blood they sucked up into her. The Queen of the mosquitos, Mosquito Girl, sighs in disappointment. "Come on, that wasn't nearly enough blood to satisfy my needs" she moaned before addressing her mosquito servants. "Now go get some more for me."

"Target has been acquired."

Without warning, a stream of flames fires up at the flying Mosquito Girl who bats it aside and studies the one responsible for the attack.

The one responsible is the cyborg, Genos who is a handsome young man with spikey blonde hair and pierced ears. The cyborg's most noticeable features are his eyes which have black scleras and yellow irises.

"I see. You make the mosquitos suck the blood and then take it all for yourself. You must be controlling each one by using some sort of signal. That would explain the mysterious behaviour. So if I were to get rid of you, their leader, would the swarm disperse as well?" wondered Genos while glancing at the billions of mosquitos who are all swarming behind the Mysterious Being.

Mosquito Girl smirks down at Genos. "Our next meal is here. Go drain that fool dry" said the Mysterious Being who orders her mosquitos to attack. Millions of mosquitos quickly converge on the cyborg who remains calm, despite the circumstance.

"Incinerate."

To Mosquito Girl's surprise, the millions of mosquitos surrounding the cyborg suddenly combust into flames, courtesy of Genos who now has his right arm raised, showing that he used the Incineration Cannon in his palm to kill the swarm of mosquitos. "I will eliminate you. Stay right where you are."

While surprised by the fact her mosquitos didn't kill the man, Mosquito Girl's arrogance quickly returns. "You believe you can eliminate me?" giggled the monster before her expression becomes manic. "Then go on and try!"

Genos responds by running up the wall of a nearby building and jumps at Mosquito Girl who dodges the cyborg's thrown punch and hits him with her claw, failing to do any vital damage to his metal body. The Mysterious Being swings her other claw, but Genos blocks the attack with his right arm. The cyborg and monster try to overpower the other but they remain at a stalemate. Seeing as he isn't making any progress, Genos detonates an explosion of heat from a port on his arm which propels him away from the Mysterious Being.

The cyborg backflips in midair and once he lands on the side of a building, he jumps off towards Mosquito Girl and throws a punch. Instead of dodging like last time, Mosquito Girl throws her own punch which nullifies Genos's own attack. The Mysterious Being then uses her free arm to smack the cyborg down to the ground, but Genos uses his thrusters to land safely on the floor. Once he safely lands, he aims his right Incineration Cannon at Mosquito Girl.

"Incinerate" said the cyborg before firing a blast of flames at the monster.

The stream of flames looks like it's gonna hit the monster, but Mosquito Girl dodges it in a burst of speed. While surprised, Genos continues firing blast after blast of fire at the monster who keeps dodging while getting ever so closer to the cyborg. Like a blur, Mosquito Girl flies past the cyborg and rips off Genos's right arm by piercing it with her enlarged horn.

The monster looks back at the cyborg with a smug expression on her face. "Maybe a leg next time" giggled Mosquito Girl who then realizes that something feels off about herself. "What the? What happened to my legs?" wondered the Mysterious Being who sees that she's now missing both of her legs.

Genos throws away Mosquito Girl's legs, having ripped them off of the monster at the same time she took his arm.

Realizing that the cyborg is tougher then she thought, Mosquito Girl attempts to flee. Genos aims his remaining Incineration Cannon at the fleeing monster and fires a concentrated ball of fire, only for a wall of mosquitos to form up and block the attack at the cost of their own lives. "You won't escape" declared Genos who gives chase after the monster.

"What the hell is that guy? He'll get me if I don't come up with something" said Mosquito Girl before licking her lips. "The townspeople may be hiding, but there are plenty of animals around to feed on" said the Mysterious Being, having sent out more of her mosquitos to feed on the animals in the surrounding forests. The monster flies high into the air while ordering her blood-filled mosquitos to return to her. "That's it! Come here little ones, empty all of the delicious juices you carry into me!" exclaimed Mosquito Girl before being surrounded in a massive dome made up of trillions of her mosquitos that all transfer the blood they gathered into her.

"So many. If she has been collecting blood from the whole town, as well as the surrounding area, then it may be more than a simple food source for her" thought Genos as he powers up his Incinerator Cannon. "I shall put an end to this as soon as I can."

Putting all the power he can muster into his Incinerator Cannon, the cyborg fires a powerful concentrated blast of fire at the massive swarm of mosquitos, causing them all to combust in a massive explosion that brightens the sky for miles around. Once the explosion dies down, Genos tries to scan for the monster, in case it managed to survive his attack.

"Looking for me?" asked a malicious voice from behind the cyborg.

Surprised that the monster managed to get behind him without his sensors picking up her signature, Genos jumps away to a safe distance and eyes the Mosquito Girl who has most definitely changed.

Her once black and white skin colour has changed into blood red, likely due to the huge amount of blood she absorbed from her mosquitos. Her white hair has also turned pinkish red in colour and is flowing in the wind. She even has a new pair of legs, having regenerated them while going through her transformation.

"You idiot, I no longer need my tiny little helpers. I mean..." stated the transformed Mosquito Girl, dismissing the lost of her mosquitos. The monster turns to the building on her right and with a single swing of her claw, she destroys it, as well as the buildings behind it. "Just look at how strong I've become!" she laughed before focusing her attention back on the shocked cyborg. Faster than Genos can react, Mosquito Girl appears behind him in a burst of speed and cleaves through his left side with a casual swing of her claw.

Gritting his teeth, Genos turns to throw a punch at the monster, but Mosquito Girl bats him up into the air with no effort. Laughing, Mosquito Girl flies up after him and as Genos's body hovers in the air, the monster blurs across the air, hitting the cyborg every time she gets near him.

"Can't your macho punches kill a little mosquito?" mocked Mosquito Girl who laughs while cutting up the cyborg's body even more. "What a weakling" she scoffed while stopping her attacks so to lazily hover in the air.

With Mosquito Girl no longer hitting him about in the air, gravity regains control and Genos's body begins to drop back down.

"I get it now. The more blood she is able to consume, the more powerful she becomes" thought Genos in realization, not that it matters. His mechanical body is severely damaged and even if he was in pristine condition and with both arms, he would still lose to the transformed monster. She's far too fast and powerful for him to beat.

Mosquito Girl hums to herself before she targets Genos's falling body. "I think I'll have your head next!" shouted the Mysterious Being in sadistic glee as she rears her right arm back to cleave off Genos's head.

"I let my guard down. I have no chance at winning" thought Genos as he initiates his self-destruct sequence so he can at least take the monster out with him. "All I can do is self-destruct. Forgive me, Doctor."

Just as Mosquito Girl is about to kill Genos, a blow to her side has the monster shriek in pain while she's being launched into a nearby building that collapses down on top of her, burying her in a pile of rubble.

Genos is quick to stop his self-destruct sequence and gasps at seeing the powerful monster knocked aside so easily.

"Are you alright?"

The injured, but still alive cyborg turns to look at his saviour with his one good eye. The man who saved him is obviously a Hero as he adorns a mostly green costume which is tight on his muscles, showcasing the raw power that hides within them. Genos then sees that it isn't just the costume that's green, but the Hero's eyes and hair are also a brilliant shade of green, practically emerald. For some reason, the man's most striking feature is his wide smile. "W-Who are you?"

Deku actually blinks, failing to hide his surprise over the cyborg's question. "You don't know me?" he asked, not insulted like how some prouder Heroes would be. Izuku became a Hero to save lives, not for the popularity, but as the Number One Hero, practically everyone knows about him, either from his daily heroics or from seeing one of the TV commercials he starred in.

All of a sudden, the pile of rubble that buried Mosquito Girl explodes outwards, revealing the monster herself who flies in the air so she can glare down at the man who punched her into the building. A large and noticeable bruise can be seen from the side that Deku had punched. "You bastard! Just for that, I'm going to gut you slowly and feed you your own entrails!" she threatened, not that it effects Deku.

"You're alive? I'm surprised" remarked Izuku, having only hit the Mysterious Being with around 2% of One For All's power. From looking at Mosquito Girl's fragile body, he didn't expect her to survive his surprise attack, but she's tougher than she looks. He'll just have to hit her a little harder.

Angry over both the throbbing pain in her side and the annoying Hero who doesn't appear to see her as a threat, Mosquito Girl scoffs before moving so fast that it appears like she just teleported in front of Deku. "DIE!" she roared, swinging her claws to gut the Hero wide open.

"Full Cowl: Spark Punch."

Mosquito Girl may have gotten a lot faster after transforming, but even she couldn't comprehend the speed of Deku's attack. One moment, she's about to rip apart the Hero who got a lucky hit on her and the next, she's a bloody smear along the destroyed road.

Even as the shockwave of the Hero's punch blows Genos's mangled body back several feet, he can't help but be amazed by the overwhelming power the man possesses. After transforming, the Mysterious Being toyed with Genos in their fight and would have killed him, if not for the Hero saving him. The same Hero who just splattered the monster along the road as if she was just a tiny mosquito, not a Demon or even Dragon-level threat.

Once the Mysterious Being has been dealt with, Deku walks back over to the injured cyborg. "Hey, do you need any help? You're kind of all broken up" Deku said, somewhat awkwardly. The Number One Hero is afraid to pick the injured cyborg up, in fear that he might just cause even more damage.

"Please, tell me your name" pleaded the injured cyborg, ignoring Izuku's worry over his condition.

Deku looks down at the cyborg, wondering if his injuries effected his mind. "I'm Deku."

"Please, take me as your disciple!"

"...what?"

( City Z - Deku's Apartment )

After watching Genos be taken away by the collector drones, Izuku didn't expect to see the cyborg ever again. So imagine his surprise that in the next morning, Genos appears by his front doorstep, completely repaired and ready to learn.

Instead, Izuku offers the cyborg a cup of tea. "So you want to be my disciple?" he asked for confirmation while he takes a seat on his couch. Instead of taking a seat on one of Izuku's couch chairs, Genos sits on the floor on his knees.

"Yes sir."

"And why is it that you want to be my disciple? Not to be insulting, but I can't exactly help in training you, since your body is mostly mechanical" stated Izuku like as if it should be obvious.

Genos stares at Izuku, managing to look confused while still keeping a serious expression on his face. "I don't understand. Do you not have parts installed in your body, sensei?"

"He already sees me as his sensei" thought Izuku in bewilderment. "I don't use any."

"You defeated that monster yesterday... with only physical power?" asked Genos in disbelief.

Obviously, Izuku isn't going to explain One For All to someone he has only met. Not even Tatsumaki or Fubuki know about the truth of One For All, although they know his strength isn't normal by any means. "I guess you could say that."

"Incredible. To be as strong as you, that is my dream" said Genos who begins explaining his life story to the Number One Hero.

Usually, Izuku is a patient man. One must be patient when dealing with one of Tatsumaki's and Fubuki's shouting matches that occur once a week, but Genos's long and detailed life story has strained his patience to its limit. When Genos finally finishes explaining his life story, it takes all of Izuku's willpower to not sigh in relief.

In the end, Izuku can sympathize with Genos. The cyborg is simply looking to avenge his family by destroying the crazed cyborg that killed them and throughout his search, he fights criminals and monsters that he comes across which puts him in Izuku's good books. Still, Izuku has never taken an actual student before. He has sometimes filled in for teachers at the Hero Academy when they turn up sick or injured from fighting monsters, but taking someone as an official student is different than teaching young teens in a classroom. He isn't even sure what he could teach the cyborg, since he obviously doesn't need any muscle training.

"Tell me, Genos, have you applied to the Hero Registry?" Izuku asked, having come up with an idea.

Genos shakes his head. "Not yet, but I have been planning to do so for when the next time the exam opens."

"Good. I have heard that the next exam will be taking place in two weeks from now so I will give you a challenge. If you pass the Hero Certification Exam with flying colours, then I will agree to take you on as my student" stated Izuku, much to Genos's pleasure.

"I won't let you down, sir!" exclaimed Genos which has Izuku smile, finding the cyborg's determination to be inspiring.

Suddenly, both Hero and cyborg turns towards the far wall to Izuku's living room. "Sensei, I sense targets approaching fast" stated Genos who crouches down so he can spring into action at any moment.

"I sense them too" remarked Izuku who pushes himself off his couch, just as the far wall smashes open. From the wreckage stands a Mysterious Being that looks like a mutated praying mantis, although the top of the monster's head is transparent, revealing its brain.

"Greetings, I am Kamakyuri from the House of Evolution" greeted the monster before he focuses his attention on Deku. "I kindly ask that you come with me, Deku. If you refuse, I'll have no choice but to cut off your legs and carry you back to our headquarters." The monster rubs his scythe-like forelegs together while licking his lips, seemingly wishing for Deku to refuse so he can get violent.

Normally, Izuku would just pulverize the Mysterious Being who just smashed into his apartment, but hearing that the monster is from the House of Evolution actually has him curious. "House of Evolution? As in the same House of Evolution that Zombieman is from?" he wondered, knowing of the S-Class Rank 8 Hero's home origin. From what he recalls, Zombieman doesn't have a good relationship with the House of Evolution and Izuku is starting to see why.

Izuku isn't ignorant to his surroundings as he can sense other monsters nearby, five more when not including Kamakyuri. An idea suddenly springs to mind. "Genos, you said that you wanted to be my student? Well I see an opportunity for you to show me what you can do. I want to see what makes you worthy to becoming my student."

Kamakyuri begins sweating when Genos raises his right arm which is now glowing with power. "Exterminate."

Outside the apartment on the street, Frog Man and Slugerous jumps in fright when a beam of fire erupts from the hole that their advanced agent, Kamakyuri made in the apartment. "I-It seems that Kamakyuri has been defeated. I can no longer sense him with my telepathy" stated Slugerous who lost contact with his comrade when the beam of flames shot out of the apartment.

Frog Man looks at Slugerous in disbelief. "What?! Wasn't he one of our stronger guys?"

The two monsters are interrupted when two figures jump out of the hole in the apartment. One they recognize as their target, Deku, but they don't recognize the cyborg who is glaring daggers at them.

"Don't worry, sensei. I will deal with them" stated Genos who charges at the two sweating monsters, but he only manages to take two steps before Deku suddenly picks him up by his shoulder with one hand. "Sensei?"

"You should study your surroundings before you rush in like that, Genos" remarked Izuku, sagely.

Before Genos can ask what he means by that, a pair of small claws poke out of the ground where Genos was just standing. After they grasp nothing but air for a moment, they retreat back underground.

"You had one job to do, Ground Dragon and you couldn't even do that right" stated another monster who walks around the corner of the street while Deku puts Genos back down. The monster is a large humanoid lion with a full mane and tail. He adorns a black shirt, animal furs on his shoulders and a leopard-skin cloth around his waist, secured by heavy chains and a belt with a lion-head buckle. He also has bracelets on both wrists and ankles and bracers on both of his muscular biceps.

Another monster that resembles a brown mole digs out of the ground nearby, looking ashamed. "Apologies. I didn't expect our target to pick him up like that."

"Useless, the lot of you" scoffed the large monster who steps past a scared Slugerous and Frog Man to smirk at Deku. "So you're the so-called Strongest Hero, huh? You don't look like much to me" said the humanoid lion before bellowing out a laugh. "But all you ants look weak when compared to the Beast King!"

"Why you-" growled Genos who steps forward to defend his sensei, but Izuku blocks him with an arm.

"No need for you to dirty your hands with him, Genos" stated Izuku who steps forward to challenge the Beast King. "Besides, you should be focusing on the enemy behind you."

"Behind me?" thought Genos, having not sensed anyone behind him until another monster smashes through a nearby house. Genos is quick to turn around and sees a gorilla-like creature that is adorned in metallic armour. "A cyborg?"

The real reason Izuku doesn't let Genos fight the Beast King is because he can tell the monster is far too strong for the cyborg to handle. Genos may have done well against Mosquito Girl before she transformed, but the Beast King is obviously on a completely different level than her. The armoured monster that Genos is fighting now is at a more realistic power level for Genos to fight so he leaves him be for now. "If he can't defeat that monster, then he won't make it as my student" thought Izuku while facing off against Beast King.

Beast King stares down at the supposed Number One Hero with a large cocky smirk on his face. "So you wanna fight? Alright then, let's see how you face off against the likes of me!" roared Beast King who lunges at Izuku with his very sharp claws poised to rip him apart.

Just as the Beast King's attack is about to connect, Deku throws a single punch which hits the Beast King in his stomach. Immediately, the monster is thrown backwards by the force of the punch, knocking aside Slugerous and Frog Man who are unfortunate enough to be standing behind him. Beast King is thrown back nearly all the way down the street before he manages to stab his large claws down into the pavement to slow down his momentum. Once he comes to a complete stop, Beast King vomits out enough blood to fill a bathtub, showcasing how much damage Deku's lone punch did to him.

"He managed to push back Beast King and make him cough up blood... with one punch!" thought Ground Dragon in complete and utter shock. The fact that the Hero did so in an almost leisurely manner makes Ground Dragon realize that they might be fighting someone a bit above their league.

Even though he is in immense pain, has a large bruise that covers most of his muscular torso and is coughing up blood, Beast King chuckles before pushing himself up to stand up at his full height. "So what the doctor said was true. You really are the Strongest Hero" praised the monster before he begins to transform. "But there can only be one king of the jungle and that will be me!" roared Beast King who's muscle bulge and increase in size while his claws sharpen even more than they already are. "Lion Slash: Meteor Power Shower!"

Izuku senses the already strong monster's power increase and reacts accordingly by activating Full Cowl to enhance his speed and reflexes. Green bolts of lightning spread across Izuku's large body with the occasional flicker of green flames that show his use of his Full Cowl technique.

Beast King lunges at Izuku and unleases a flurry of slashes so fast and strong that the shockwaves alone manage to cut apart nearby buildings with ease. However, they fail to cut Izuku who is moving so fast that he is able to dodge each one of Beast King's slashes, although Slugerous and Frog Man aren't so lucky for they are too slow to avoid the shockwaves and end up sliced into pieces, not that Beast King cares about killing his comrades.

Having enough of the destruction released upon by the monster, Izuku dives forward and gets into Beast King's personal space. Beast King smirks down at Izuku as he only sees an easier target, now that the Hero is so close. "DIE!" roared Beast King while thrusting his large claws down on Deku. The sound of ripping flesh and breaking bones echo across the city street.

No longer smiling, Izuku closes his eyes and ignores the splatter of blood on his cheek. "If it's any consolation, you were pretty strong" said the Number One Hero who's left arm is currently imbedded into Beast King's chest. Izuku's hand is protruding out of Beast King's back and in his bloodied hand is the monster's still beating heart. Even now, killing doesn't feel very heroic to Izuku, but he has learned a long time ago that it's necessary. Unlike criminals, some monsters have proven to be too powerful to be kept inside any prison on the planet so with no other alternative, they must be killed so they can no longer cause widespread destruction.

Beast King grunts in pain as blood spills out of the hole in his chest and his mouth. When he tries to speak, all he can let out are a few gurgles before he loses all his remaining strength and collapses on Deku's shoulder, dead.

Ground Dragon shakes in fear after watching Izuku kill the House of Evolution's second strongest fighter. One moment, Beast King is pressing the attack, using his strongest move to do so and the next, the Hero thrusts his entire arm into Beast King's chest, killing him. "T-This i-is who we were s-suppose to c-capture? This is t-the s-strength of the S-Strongest H-Hero?" thought the shaking Ground Dragon. "D-Doctor G-Genus sent us to our deaths!"

Ground Dragon's fear only escalates once Deku turns his sights on himself. With a shriek of terror, Ground Dragon dives into the floor and begins digging so to escape the wrath of the Strongest Hero. Unfortunately, Ground Dragon doesn't get far because a whip made out of black energy dives in after the monster and wraps around his body before pulling him back to the surface. After being ripped out of the underground, Ground Dragon is suspended in front of Deku by the blackwhip of energy which is protruding out of the Hero's open right palm. "I-IMPOSSIBLE!"

"You're going to tell me everything I need to know about the House of Evolution" said Deku who's smile is no longer plastered on his face. All that's left is the Strongest Hero who wants to deal with the threat that is the House of Evolution. While the monsters like Kameykuri and Ground Dragon could be dealt with by nearly any B-Class Hero and above, the same can't be said about Armored Gorilla or Beast King. If the House of Evolution can make monsters as strong as them, then they need to be dealt with as soon as possible. Who knows, they might have even created another Zombieman.

Sadly, Deku isn't getting much answers from Ground Dragon who is so terrified that he has lost all cognitive function. All the monster does is sweat heavily and shake in fear. Now that Izuku thinks about it, the petrified monster somewhat reminds him of his old classmate, Mineta, at least when it comes to the sweating and shaking in fear part.

With a sigh, Izuku goes ahead to give the monster a quick death and so, tightens the blackwhip around Ground Dragon's throat which ends up beheading the monster. Dropping the two halves of Ground Dragon's body, Izuku turns to see how Genos is doing and is impressed to see that he has already dealt with the cyborg gorilla and did so without getting so much as a scratch on him. The same can't be said for the cyborg gorilla who has lost his helmet, as well as both his arms and legs.

"Answer the question or you're going to be eliminated. Your choice" said Genos, aiming an Incinerator Cannon at the crippled monster.

"It is you who will be eliminated, you fool. I am the third most powerful fighter in the House of Evolution. At your power level, you will never beat the Beast King, the second most powerful fighter. You will be destroyed" told Armored Gorilla, sounding like a robot.

Izuku walks up from behind Genos and throws an object on the floor. Armored Gorilla looks down at the object and recognizes it as Beast King's belt, although the blood on the belt buckle is new. "Beast King is dead and if you don't want to join him, then you're going to tell us everything."

For a moment, it seems like Armored Gorilla is going to deny them. At least, until he begins sweating and shaking his head in fear, comically. "L-Look, I'm sorry! I'll tell you everything, just don't kill me!" pleaded the monster, losing his robotic voice.

Izuku blinks in surprise. "Wait, what happened to your robot voice?"

"Sorry about that, I was just trying to sound cool" answered Armored Gorilla.

Afterwards, Armored Gorilla explains the origins of the House of Evolution, as well as the man who created it, Dr. Genus. Apparently, Dr. Genus's goal in life is the artificial evolution of humanity as a species, but since no one in the science community would help him, Dr. Genus continued his work by himself. It was only when the scientist was in his seventies did he manage to get the results he was looking for. With said results, he has managed to return his body to its youth, create an army of clones based off himself and has conducted experiments on both animals and humans, creating mutant monsters like Armored Gorilla and Beast King. Izuku also finds out that Mosquito Girl was also one of Dr. Genus's creations.

"Is the reason he sent you after me because of revenge? Because I killed Mosquito Girl?" asked Izuku.

Armored Gorilla shakes his head. "No. The boss man saw how easily you defeated Mosquito Girl after she gained her complete transformation and so, he ordered us to capture you and bring you back to our headquarters so he can study your body."

"I can see why he would want to study sensei's body to further his research in evolution. Sensei's body surpasses that of other humans" said Genos, having spent last night watching many videos online that show Deku destroying titanic monsters, change the weather and even create twisters, all with one punch. No normal human could possibly have such godly strength in their body.

Izuku frowns for many reasons. The first being that if what Armored Gorilla said is true, then this Dr. Genus will likely try to capture him again, but with more monsters. Secondly, Izuku doesn't like the sound of Dr. Genus at all. The scientist's goal to cause humanity to go through the next stage of evolution doesn't sound right with Izuku because the scientist sounds a lot like the people who belittled and bullied him as a child for being Quirkless. Just because he wasn't born with a Quirk of his own, he was looked down on and treated like as if he's lesser than everyone else.

Izuku looks down at his open palm and can't help but find amusement in the irony. Everyone bullied and scoffed at him because he didn't have a Quirk and now, he has seven of them.

Dismissing his thoughts on the past, Izuku turns to Genos. "Genos, let's go. We've got all we need so let's pay the House of Evolution a visit" told Deku before he walks away. Genos nods and after asking Armored Gorilla if the House of Evolution has any other cyborgs, Genos follows after his sensei.

( House of Evolution )

"Impossible. Our elite force, formed for the extermination of these obsolete humans, wiped out?" exclaimed Dr. Genus who clenches his fists in rage. On the monitor of the large computer reveals that everyone but Armored Gorilla has been killed, including Beast King!

Surrounding Dr. Genus is his small army of clones who all look exactly like him, except for their plain white shirts and pants which have different numbers on them so to identify which clone is which. Clone #33 speaks up. "According to Armored Gorilla's report, the two responsible in doing so are on their way here." On the monitor shows an image from Armored Gorilla's point of view, showing both Deku and the unknown cyborg.

Dr. Genus grits his teeth, feeling a shiver of fear when he sees the image of the Number One Hero no longer smiling. The scientist didn't expect so much resistance from the Hero, even if he's supposed to be the Strongest Hero of the Hero Association. Deku is still an obsolete human who should have fallen to his creations, but he has proven to be far stronger than he expected.

"If they manage to make it to the lab, all of our research, everything that we have been working on could be destroyed. We're in serious trouble" stated Clone #78.

Realizing that he has little options left, Dr. Genus clenches his fists and looks down. "We're forced to use our trump card" he said, making the Clones gasp. "Begin preparations for the release of Carnage Kabuto."

Dr. Genus's order is met with the disbelieving and terrified cries of all his Clones.

"WHAT!?"

"No, not him!"

"That's crazy!"

"He'll finally be released?"

"He's right. That might be the only way."

"It's too dangerous."

"I have a bad feeling about this."

"Quiet down! He'll be our very last resort" told Dr. Genus, silencing his Clones.

Clone #33 gulps, nervously. "But, sir..."

"We'll start by activating all of our traps from the first floor to the eight. If we're lucky, they will take care of the intruders. I'm aware what would happen to us if we fail, especially to me" stated Dr. Genus, knowing that if the traps don't work then one of two things will happen to him. Deku will either arrest him or Carnage Kabuto will kill them all.

As it's still too early to tell what will happen, he will just have to wait and see.

xXx

Moving faster than the eye can see, Deku flies across the sky while holding Genos under his left arm. On occasion, multiple shockwaves occurs whenever he breaks the sound barrier.

"Incredible! I knew you could fly, but not as fast as this, sensei" said Genos as the wind brushes past him, harshly. The harsh wind might have hurt the skin of a normal human, but Genos's skin is synthetic so he doesn't feel any pain from the cold winds.

"Apologies, but this faster than us running and I don't think you can keep up with my top speed" said Izuku, not out of arrogance, but simply stating a fact. When using 100% of One For All, Deku can keep up with the likes of Flashy Flash who is known as the fastest Hero in the world. Genos might be fast, but he is nowhere near fast enough to keep up with Deku. If Genos tried, he would only damage his mechanical body.

After flying across the sky in blinding speeds for a solid ten minutes, Izuku spots the tall building that Armored Gorilla told them about. Deactivating his Float Quirk, Izuku let's gravity drop him back down to the ground in front of the building. When Izuku's body hits the floor, the ground explodes in a shower of dirt and rock, but when the dust clears, Izuku can be seen crouched in the crater, having landed perfectly without any damage to his person, nor to Genos who he still carries under his arm.

"We're here" stated Deku while dropping Genos who gets up to look up at the tower that makes up the headquarters for the House of Evolution. Taking in his surroundings, Izuku can see why Dr. Genus decided to place the headquarters here. The headquarters is located in a forest with a large cliff close enough that it hides the tall building from one side. The building itself looks old and weathered, having moss growing along the sides of the building, but if what Armored Gorilla said about Dr. Genus unlocking a scientific method to keep his youth is true, then the scientist and the building must be nearly a hundred years old which explains the weathered appearance of the building. Unless you were specifically looking for it in the middle for the forest, you likely wouldn't find it.

"Looks like there's eight floors to it so we should start from the top and make our way to th-"

BOOM!

The old and weathered headquarters to the House of Evolution explodes and is incinerated on the spot, courtesy of Genos who went ahead and destroyed the building with the use of both of his Incinerator Cannons.

"... Genos."

"Yes, sensei?"

"Why did you just blow up the building?"

"In the interest of efficiency, I thought it would be best to destroy them all in one fell swoop" answered the cyborg, honestly.

Izuku forgets that Genos is only nineteen years old and has yet to learn the steps to being a good Hero. "True, that was efficient, but next time, don't just destroy everything. When dealing with criminals, our job as Heroes are to apprehend them while also gathering evidence. We only kill humans if we have no other choice on the matter. If we are so quick to kill humans, then we become no better than the monsters."

Genos looks at his sensei, finding a lot of wisdom in his words. In the blink of an eye, Genos takes out his notebook and begins writing down Izuku's words. "So inspiring! No wonder you are the Number One Hero. Strong in both body and mind" complimented the cyborg while he writes.

Genos's straightforward and serious manner reminds Izuku a lot of his old classmate, Tenya Iida. Shaking his head over the cyborg's antics, Deku walks over to what little remains of the House of Evolution. After looking around the rubble, Deku spots a metal door in the floor. Walking over to it, Deku grabs one corner of the door and peels it open without any struggle. "Looks like there's a basement."

xXx

The sound of screams and gunfire can be heard in one of the rooms of the underground facility for the House of Evolution. In the room, one of Dr. Genus's Clones can be found shooting an assault rifle at a giant monster.

Said monster is a massive being that towers over the shooting Clone and looks humanoid in appearance, but has many characteristics that resembles a beetle, including a thick exoskeleton, a pair of wings encased by elytra and a large horn on its head. Along its bulky arms and legs are large spikes.

The monster is Carnage Kabuto, the strongest fighter in the House of Evolution.

"S-Stop it! Just stay away!" yelled the Clone is terror as he continues firing his automatic rifle at Carnage Kabuto, not that it does anything to the monster. In fact, Carnage Kabuto's exoskeleton is so thick that the bullets aren't even tickling him.

The Clone's cries are quickly silenced when Carnage Kabuto throws a lazy punch at him, causing the clone to explode from the power in the punch and become a bloody smear across the floor.

Behind Carnage Kabuto, Dr. Genus enters the large room with his hands in his pockets so he can pretend that they're not shaking in fear. "Hey, uh, Carnage Kabuto" greeted the sweating Dr. Genus who is trying to keep himself calm while in the presence of his strongest creation. "Tell me, are you feeling alright? It seems like you killed a bunch of my Clones again" asked the scientist while referring to the smears of blood and remnants of white cloth which use to be some of his Clones who were given the unfortunate job to releasing Carnage Kabuto. "Are you satisfied?"

"You fool! Why would I be satisfied, huh?" asked the monster in annoyance. "I've been kept up deep under the earth. I'm the strongest warrior in the entire House of Evolution!" bellowed Carnage Kabuto while ripping off the heavy metal brace around his neck, freeing him from the last of restraints that kept him locked up for so many years.

"You were imprisoned because you're mentally unstable. We couldn't control you. There was no choice on the matter" answered Dr. Genus, glaring at his strongest creation.

"You couldn't control me?" laughed Carnage Kabuto. "Moron. I'm the ultimate culmination of the new human you guys had sought for so long. My intellegience and physical strength are incomparable to your own. The way I see it, you and your Clones should be the ones obeying me" stated Carnage Kabuto while getting into Dr. Genus's face. To add insult to injury, the monster sticks his tongue out, mockingly.

"No, you're a failure" thought Dr. Genus, believing Carnage Kabuto to be his greatest failure. "It's true that you perform at unheard of levels, but you lack humanity."

"Go ahead and kill me. Plenty of Clones could take my place" said Dr. Genus, accepting his faith. If he wanted to, Carnage Kabuto could kill him and all his Clones and there would be nothing they could do to stop him. Even if all their other creations like Mosquito Girl and Beast King were still alive, they would just be killed by Carnage Kabuto. He's simply that strong.

"Oh~?" voiced Carnage Kabuto in curiosity.

"But I have a favour to ask" continued the scientist as a holographic screen appears beside them, showing a captured image of Deku and Genos. "There's a specimen I must have. He's proven to be extremely strong, said to be the Strongest Man on the planet. I want you to catch him for me..."

Carnage Kabuto looks at the screen with an excited grin on his face.

"... dead or alive."

xXx

Ever since they found the underground hatch, Deku and Genos have been walking down a straight hallway for the past five minutes, failing to find any signs of anyone alive in the underground facility.

"Stay on your guard, Genos" told a serious Izuku, although he remains smiling.

"I will, sensei" nodded Genos, walking alongside Deku who suddenly stops, making the cyborg stop as well.

"Something's coming."

Genos turns to his sensei in confusion before he stiffens up, discovering two living signatures from his sensors.

"Sensei could sense them coming even when my own sensors couldn't pick them up?" thought Genos, only being further amazed by his sensei. The more he learns about Deku, the more reasons why the man is deserving of his Number One Hero title.

In the distance, they can see lights being smashed, courtesy of Carnage Kabuto who is running towards them while holding an injured Dr. Genus in his right hand. "Which one is it?" asked the monster.

"T-The one on the right" answered Dr. Genus, struggling to remain conscious with the pain from Carnage Kabuto's rough handling of him.

"In that case, you don't need the one on the left!" exclaimed Carnage Kabuto who backhands Genos into the wall while also dropping Dr. Genus to the floor.

"Genos!" cried Izuku, seeing the cyborg is now imbedded into the wall. At the same time, Carnage Kabuto appears behind Izuku who turns to him.

"My name is Carnage Kabuto. We've got a combat experimentation room back this way" said Carnage Kabuto while pointing a thumb behind him. "Let's throw down in there."

Izuku glares up at Carnage Kabuto with his eyes while keeping his smile. "This monster is strong. Stronger than Beast King. Dragon-level threat, for sure" he thought while nodding. "Fine then. Let's fight."

Grinning, Carnage Kabuto leads Deku into the combat experimentation room which happens to be a large room that has giant white tiles covering the floor, walls and ceiling.

"Pretty big, huh?" said Carnage Kabuto as Deku and himself square off against each other. "It's the largest room in this facility. This is where we fight to test our combat ability, which means there's plenty of room here to kick your ass." The monster has an excited grin on his face. "Let's start the killing."

All of a sudden, Carnage Kabuto is enveloped in intense flames. Once the flames die down, Carnage Kabuto curiously looks over to the source of the flames, having been left completely unharmed by the intense heat. "Huh, still alive are you?" he asked, noticing that the one who attacked him is the cyborg from before.

Izuku didn't expect Genos to recover so fast after the monster imbedded him into the wall so he's also surprised by Genos's sudden attack, but still tries to stop him. Genos wasn't strong enough to fight Beast King earlier today and he most definitely isn't strong enough to beat Carnage Kabuto. "Genos, stand down. You have no chance in defeating him" told Izuku, knowing that while Genos has a lot of firepower, none of it will do any good against Carnage Kabuto's powerful shell.

While hurt from the blow he took earlier, Genos stands to his full height and focuses his attention on the monster. "No need to worry about me, sensei. I will handle him" told Genos, ignoring Izuku's order as he charges at the monster. Like a blur, Genos dashes across the field and lands a powerful spin kick across Carnage Kabuto's chest, not that it did any damage to the monster.

Genos then begins circling the monster while firing powerful beams of fire at him. Not once has Carnage Kabuto dodged any of the cyborg's attacks. Jumping into the air, Genos flips forward before he pulls his right arm back for a finishing move.

A smoky, but unharmed Carnage Kabuto looks up at the incoming cyborg with an arrogant grin on his face. "You fool."

Genos's eyes glow. "Machine Gun Blow!" exclaimed the cyborg before he delivers a barrage of powerful and destructive punches on the monster. However, Carnage Kabuto counters by throwing a punch almost lazily at the cyborg. The punch connects and Genos's body is thrown back while it bounces along the floor several times before Deku catches him.

Deku looks down at the injured cyborg in his arms. "I told you that you couldn't handle him" said the Number One Hero. Izuku can see that like many Heroes, Genos thinks he's stronger than he really is. The cyborg may have fought monsters before, but he has never fought beasts like Carnage Kabuto and so, doesn't realize that there are people and creatures out there much stronger than him.

With his face cracked and his left eye destroyed, Genos glares at the smug monster with hatred. "Let me... take him" pleaded Genos who aims his left Incinerator Cannon at the monster before firing the most powerful beam of fire that he can come up with.

The powerful beam of fire might have incinerated Tiger-level and Demon-level monsters, but Carnage Kabuto is on a whole different league than them. Taking a deep breath of air, Carnage Kabuto blows the air in his lungs at the beam of fire, not only stopping it in its tracks, but also repelling it back at Genos and Deku.

"With his breath? Impossible!" cried out Genos in disbelief, watching as his most powerful beam is repelled back at himself with just the monster's breath.

Before the flames can hit them, Izuku focuses One For All into his right forefinger and aims it at the incoming flames. "Flick Bolt!"

Izuku flicks his finger and with the use of One For All, releases a powerful beam of pressurized air at the incoming stream of fire. The concentrated burst of air disperses the flames away while also hitting Carnage Kabuto in the chest, causing an explosion of wind. When the dust settles, Carnage Kabuto can be seen without a single scratch on his shell.

"Not bad. That actually tickled a little" chuckled Carnage Kabuto, showing no damage from Izuku's finger flick. He even sticks his tongue out at Izuku, mockingly.

"Genos, I want you to stay by the exit" told Deku who stands up to face off against Carnage Kabuto.

"But sensei, I can sti-"

"Genos, if you want there to be any chance of me accepting you as my student, then you will follow my orders and stay by the exit." This time, Izuku pushes his full authority onto the cyborg who can only gulp nervously, feeling an invisible pressure press down on his body. "If you continue to fight, you will lose and you will die. How will you be able to avenge your family if you're dead?"

Genos widens his eyes in realization, now knowing the truth of his sensei's words. He wanted to prove himself to Deku so badly that he went out of his way to fight the monster that is so obviously above him in raw power and defence, even if it killed him.

"I'm so foolish. I obviously still have so much to learn" thought Genos, chastising himself while he pushes himself back up to his feet. "Very well, sensei. I wish you luck on your fight." The cyborg turns and runs for the exit, leaving Izuku and Carnage Kabuto in the room.

With Genos no longer in the way, Izuku can now get serious. The Number One Hero loses his smile and walks towards an arrogant Carnage Kabuto with both of his fists clenched.

Deku's serious demeanor amuses the Dragon-level monster. "Oh, I see it. I see it. You're supposed to be strong" mocked Carnage Kabuto while pointing both fingers at the Hero. "Strongest Man in the world they say."

"Look at you, oozing with confidence. You must think that you can get away with anything" said Deku who's green eyes actually seem to glow. "I think it's about time someone teaches you a lesson."

Carnage Kabuto chuckles in amusement before disappearing from sight, moving faster than a being of his size should be capable of. Laughing, the monster runs along a wall before appearing behind Izuku with his fist pulled back for a powerful punch.

"Such speed" thought a viewing Genos, shocked to see a creature as big as Carnage Kabuto move so fast. "He's even faster than Mosquito Girl!"

Smirking, Carnage Kabuto throws a punch at the Hero's back so to see him become a bloody smear across the floor.

However, that doesn't happen for instead, Deku suddenly turns around to face the monster in an instant and with his right hand, redirects the monster's punch away while throwing one of his own with his left hand, all the while he focuses 30% of One For All's power into his Full Cowl technique.

"Spark Punch."

With his arm encased in the lighting of One For All, Deku punches Carnage Kabuto in the chest, causing an explosion of power to wash over the room. Genos has to keep himself steady so to not be blown away by the explosion. Before the smoke can subside, Deku is thrown out of the smoke, courtesy of Carnage Cabuto who punches him. "You fool."

Quickly recovering, Izuku spins while in midair and lands on the wall with his feet before kicking off of it, launching him back at the monster who crosses his arms, just in time to block Midoriya's flying dropkick, although the force of the blow does push back the monster a few hundred feet, it does no noticeable damage.

Both monster and Hero size each other up before in a blur, both disappear and reappear in the centre of the room, throwing a barrage of punches at each other that are so fast that it looks like they are throwing ten punches at once. Most of the thrown punches are countered by the other's which causes miniature shockwaves while the punches which do hit are mostly ignored.

"They're both evenly matched" thought Genos who ignores how the wind blows back his hair every time a collision of fists causes a shockwave. Not even his mechanical eye can keep up with the speeds of their punches.

Charging his power up to 40%, Deku's strength and speed increases, drastically.

All of a sudden, Deku catches both of Carnage Kabuto's arms and squeezes them. The monster widens his eyes in surprise when he sees his arms armour-like shell crack under the Hero's growing strength. "Is he getting stronger?"

Carnage Kabuto doesn't get much time to think on that because with both of his arms seized, he has no way to protect himself from Midoriya who jumps up and throws a powerful upwards kick which hits the monster's chin. Carnage Kabuto's mouth is forced closed by Deku's kick which also propels him up to the ceiling which he bounces off of and has him thrown back down to Deku who jumps up to meet the monster in midair.

With a battle cry, Deku throws a punch up at the falling monster, but Carnage Kabuto manages to avoid the attack by flying back up into the air by using his wings. At least, Carnage Kabuto thought he dodged the attack. Even if Deku didn't physically hit the monster, the power of his punch blows an incredibly powerful gust of wind that throws Carnage Kabuto back and forcefully presses him to the ceiling. With the gust of wind pressing Carnage Kabuto into the ceiling, the monster can only roar in pain once Deku jumps up and punches the monster in the chest, forcing Carnage Kabuto to cough up blood while pieces of his shell fly off. The ceiling itself cracks up with some rubble falling to the floor.

"Get off me!" yelled Carnage Kabuto who kicks Midoriya away now that the winds has died off. Izuku backflips before he lands back on the floor while skidding backwards a couple of feet.

Carnage Kabuto drops back down to the floor and lands less gracefully then Deku, due to his injuries which he sustained from Deku's previous punch. "How is this possible?" wondered a panting Carnage Kabuto who looks over himself to see the extent of his injuries. His powerful shell which can brush off bullets and rockets has been severely damaged with pieces haven fallen off and cracks covering nearly his entire body. The monster can also taste the blood that is pooling in his mouth, meaning that he has suffered internal damage, but his regenerative abilities has mostly healed him of such injuries. "How can a human be this strong?"

Angry over his injuries, Carnage Kabuto charges at Izuku with a scowl and his fists clenched. "Take this you bastard!"

"I punched him with nearly half of One For All's power and he can still move so fast" thought Izuku, honestly surprised that Carnage Kabuto survived being hit with 40% of One For All's power, even if it's spread throughout his body when he uses Full Cowl. "That shell of his must have absorbed most of the impact and I'm guessing he has some sort of regenerative ability to heal what damage I did to him. Which means I need to take him out in one blow." Nodding to himself, Izuku decides to go all in and use 100% of One For All to finish off Carnage Kabuto.

Deku tenses his body and separates both feet before rearing his right arm back, preparing a punch that contains 100% of his power. Lightning engulfs Deku's arm which bulges in size while red veins begins to stretch across the bulging muscular arm. "One For All 100%: Big Ba-"

Before Izuku can finish his move, Carnage Kabuto suddenly stops his charge and instead, jumps far away until his back is pressed against the wall. "Huh?"

An injured Dr. Gunos who has been watching the battle between the Strongest Hero and his Strongest Creation is left with his mouth hanging wide open in shock. "Impossible! Carnage Kabuto retreating?!"

A heavily sweating Carnage Kabuto breathes in heavily as he stares at his opponent in terrified disbelief. "If I stayed on the attack, he would have killed me" thought the monster, having sensed an unbelievable amount of power coming from the Hero. The Hero was strong ever since the start of the battle, but the monster has noticed that the longer they fought, the more powerful the Hero seems to become.

"Bastard has been holding back on me" thought Carnage Kabuto, forgetting his fear once his rage begins to take over. The monster doesn't like to be looked down on, especially by some worthless human. "You think you can look down on me!?" roared Carnage Kabuto who begins transforming.

Dr. Gunos widens his eyes in horror. "Oh no, it looks like he's going into another rampage." The scientist's security system detects Carnage Kabuto's transformation and emits an alarm while also locking down the entire facility. The only exit to the combat experimentation room closes behind him, trapping him with the two Heroes and the out of control Carnage Kabuto.

Deku narrows his eyes as he watches Carnage Kabuto's muscles bulge, disgustingly. The monster's damaged shell shatters as his muscles become too large to contain in them. Carnage Kabuto's horn grows longer in size and becomes incredibly sharp. Once his transformation is complete, Carnage Kabuto glares down at Deku with his blood red eyes. The monster's disgustingly large purple muscles and green veins nearly seem to glow in the dark, especially when the experimentation room changes in appearance and now it looks like everyone is standing on an invisible floor.

"CARNAGE MODE!" bellowed Carnage Kabuto who stomps his feet on the ground, cracking the floor with ease. "When I get like this, I lose control for a whole week and my lust for death cannot be quelled" told the transformed monster. "When I'm done killing you, I'm going to head to town and go on a killing rampage unt-"

Carnage Kabuto is interrupted by Deku who punches the monster in his left cheek, having appeared before the monster in an instant, now powered with 60% of One For All. Green blood spurts out of Carnage Kabuto's open mouth, but the monster is quick to recover and throws its own punch at the Hero.

Deku actually has to clench his teeth to suppress the wince from Carnage Kabuto's punch which bounces him off two walls and the ceiling. The Hero stops himself in midair by using Float, but he is quickly attacked by Carnage Kabuto. He can only cross his arms across his chest to lessen the force in Carnage Kabuto next punch which is stronger than the previous one. The punch launches him back, but Izuku quickly wraps Blackwhip around the monster's neck to stop him from going far and is repelled back at Carnage Kabuto who is too busy trying to stop the whip from choking him to block or avoid Deku's shoulder bash.

Deku can hear Carnage Kabuto's bones breaking, but the monster is in so much rage that he ignores the pain and instead, throws a barrage of punches down on Deku who is deflecting them, although more than a few manage to hit its mark.

"Time to finish this."

"DIE! DIE! DIE! DIE!" roared Carnage Kabuto as he throws punch after punch down at the Hero so to turn his bones into dust and muscles into paste.

Filled with so much rage because of his transformation, Carnage Kabuto doesn't even process the fact that Midoriya has suddenly vanished in a flash of green light, nor the fact that he no longer has any arms, due to Midoriya having ripped them off in that instant. Carnage Kabuto soon figures out that something is wrong when a dreadful feeling of doom fills his body, causing him to calm down from his murderous rage for a moment.

The reason for the cold feeling of dread making the monster break out in a sweat is because of Midoriya, who is enveloped in a combination of green flames and lighting rears his right arm back for his finishing move. The now glowing Hero gathers the power of One For All into his right arm which is bulging and covered in red veins. So much power is flowing through Deku's arm that it actually manages to disintegrate his glove and the right side of his Hero costume. Deku's Hero costume may be designed to withstand blows from powerful monsters and when he uses Full Cowl, but the costume can't withstand all of One For All's power being focused on one single point.

It isn't only Izuku's costume that is being damaged, but the surrounding environment as well. As Deku focuses One For All into his arm, the ground all around him cracks and craters as the entire underground facility shakes.

"One For All 100%: Big Bang Blast."

For everyone, it nearly seems like time stops after Deku throws his punch. For what seems like forever, nothing happens, but then, an explosion of light blinds everyone in the room, as well as a powerful gust of wind that blows in every direction. When the light eventually dies down, Dr. Genus and Genos turn back to see what has happened.

For Dr. Genus, even his genius mind couldn't comprehend the sheer overwhelming power of Deku's punch. One moment, Carnage Kabuto is standing there after getting his arms ripped off and the next, he's just gone. There's no blood, bone or anything that can be used to identify the existance of Carnage Kabuto.

In fact, everything facing the direction of Deku's outstretched fist is gone, including the wall. From the hole where the wall use to be, the scientist can see that it leads out to the surface and that for miles away, the forest has simply vanished, leaving behind an empty wasteland of what use to be a vast land of flora and fauna.

"He eradicated Carnage Kabuto... with one punch?" thought the scientist who is only now processing the fact that his most powerful creation is now nothing but dust in the wind. The Hero's punch didn't even leave a scrap of Carnage Kabuto left, having obliterated him out of existance.

While relieved that his sensei defeated the powerful monster, Genos is just as shocked as the scientist to see the aftermath of Deku's punch. "What destructive power. It's almost like sensei's fist has the power of an atomic bomb, if not several" thought the cyborg.

A slightly sweaty Deku looks at the wasteland which use to be covered in forests and mountains before looking at the fist which caused said destruction. "Maybe I should have held back to 80%" muttered the Hero, realizing that he may have gone a bit overboard with defeating the monster. In the past ten years he has spent as both a vigilante and as an official Hero, none were as powerful as Carnage Kabuto who made him use 60% of his power, a feat that very few have managed to accomplish. However, he needed to finish the fight fast once Carnage Kabuto entered Carnage Mode as he feared that the scientist and Genos could end up killed in the crossfire of the monster's rampage.

Turning away from the massive hole he made in the wall which was designed to withstand powerful attacks from the House of Evolution creations, Izuku Midoriya eyes the injured scientist who caused this mess in the first place. "Dr. Genus, I am placing you under arrest for illegal experimentation, destruction of property, attempted kidnapping and attempted murder. Please don't resist or I'll be forced to detain you" he said, all with a smile on his face.

Dr. Genus sniffs but shakes his head. "I won't resist, not to you. You have actually thought me a valuable less today."

Izuku's smile slightly widens over hearing that. "Oh? And what lesson is that?"

"You showed me that it isn't humanity that needs to change. Instead, I realize that I am the one that needs to change."

xXx

Name: Tatsumaki

Aliases: Tornado of Terror

Rank: S-Class Rank 2

Stats:

Power: S+++

Speed: S+++

Endurance: S+++

Durability: S+++

Technique: S+++

Intelligence: A++

Cooperativeness: C

Leadership: B