All in your head

Midoriya heard muffled blasts and shouting when he began to open his eyes. Midoriya however noticed something was off as he closed one eye and noticed he was now blind in his right eye.

"HES A FUCKING TANK!" Bakugou shouted

Gigantomachia and some villains were fighting with Todoroki, Bakugou, Endeavor, and Mirio

"Master where are you?!" Gigantomachia cried

"We meet again Endeavor!" Dabi said

"Let me take over and get rid of this trash." A sinister voice echoed

Midoriya looked over and set his eyes on Gigantomachia, the presence that had taken over him although not entirely, it was controlling only his thoughts but that was more than enough to influence his actions. Gigantomachia was destroying everything around to find his master until he was suddenly launched backward.

"Master is that you?" Gigantomachia asked as he looked up

"No, it's not." Midoriya said

"It is you master." Gigantomachia said with tears in his eyes

Midoriya floated down to the ground and looked into a cracked mirror on the ground inspecting his right eye and noticed the right side of his hair had begun to turn white.

"What happens now is inevitable. You should have just killed Shigaraki" All For One's voice echoed in Midoriya's mind

"Midoriya!" Bakugou shouted but was ignored

Midoriya began to walk toward the villains slowly and a large gust of wind began to emanate from his body.

"Master I'm so happy!" Gigantomachia said as he bowed toward Midoriya who was walking toward him

"So Endeavor we finally have a chance to talk!" Dabi shouted

"Dabi" Endeavor said

"Don't call me that, call me by my real name. Touya." Dabi said with a smile as he poured a liquid changing his dyed hair back to normal

"Brother Touya?" Todoroki said surprised

"I know my face is messed up but I'm hurt that you didn't recognize me the first time." Dabi said with a twisted smile

Midoriya looked up at Dabi and wasn't as surprised he knew Dabi's hate for endeavor went far beyond normal.

"As we speak my story and your evil is being broadcasted to the world father." Dabi said

"I planned to wait till Shoto became a model hero. Then I would kill him but you became the number one hero, I couldn't let you enjoy your place." Dabi explained

"Did you just think because you were number one and looked to the future all your past sins would be forgiven? Those 30 innocent dead are on your hands NOW ITS TIME FOR YOUR WAKE UP CALL. The past never forgets, come dance in hell with me Enji Todoroki, WITH YOUR SON" Dabi said maniacally

Midoriya had heard enough and as much as he agreed Endeavor deserved to pay for his deeds, Dabi still stood in his way and needed to be put down.

"I've heard enough." Midoriya said

In the blink of an eye Midoriya was in front of Dabi and placed his hand in front blasting him with air cannon

"AGH!" Dabi said as he smashed into a wall in the near distance

"YOU BIG IDIOT DO SOMETHING!" Skeptic said kicking Gigantomachia

"But I can't hurt master." Gigantomachia said conflicted

"Your childish tantrum ends here Dabi or should I say Touya? Which do you prefer?" Midoriya said as he walked up to Dabi who was on the ground

"You think this will stop me? Midoriya." Dabi said with a crooked smile

Dabi knew all about Midoriya and his past, where he lives and who he holds dear.

"That's right Midoriya step away or your mother will be dead by tomorrow." Dabi said as he stood up

"You make a great point." Midoriya said

Dabi sneered at Midoriya and looked ahead at Endeavor

"But you are all going to be on the ground before that can happen." Midoriya said

"I'm sorry about your mother." Dabi said cackling

Midoriya dashed toward Dabi and punched him in the throat at high speed but not enough to kill him.

"Maybe a body bag will suit you more." Midoriya said as he looked at Dabi with a twisted smile

"I-ca-I cant-" Dabi said coughing as he struggled to speak

"DONT KILL HIM!" Endeavor begged

"S-SHUT THE FUCK UP!" Dabi shouted at Endeavor

Midoriya grabbed Dabi by his collar and threw him against a store shop window.

"So much for your plan of revenge." Midoriya said

Midoriya soon set his eyes on Gigantomachia when he heard a voice calling to him.

"Toga had asked me if you ever considered us human." Spinner said as he jumped from Gigantomachia's back

"No." Midoriya said

"Eh?" Spinner replied surprised a that answer

"No you are not human, how many have you killed? Innocents that have nothing to do with this world of hero's you hate so much, you're all going to be behind bars soon anyway. Midoriya said

There was a pause and Midoriya's demeanor changed once again

"I have finally come to a conclusion, the true solution has finally come to me." Midoriya said walking toward the villains with a twisted smile

"This isn't good." Todoroki said

"I must set an example. An eye for an eye seems fair right? Unfortunately, I can't kill you more than once." Midoriya said as he looked at the group of villains cold faced

"Listen to him he seems like himself yet at times it's like he's another person." Mirio added

"Master these servants can prove useful." Gigantomachia said

Midoriya looked over at GIgantomachia and punched him back a few yards causing a large shockwave. Midoriya's fist was bleeding after that punch but as he lifted his arm it healed instantly. The villains on Gigantomachia's back jumped off just in time before they were crushed.

"You asked me if I considered you all humans and I ask how could you be humans? You're all murderers. I heard Hawks killed Twice, but Twice was like a child running around with a knife. His quirk was too strong and dangerous it needed to be taken away even if it meant his death." Midoriya said

The villains stared at Midoriya taking a few steps back.

"Yes you're all children running around with knives and I can barely stand to watch. If you must die so be it but please just come quietly and surrender." Midoriya said

"But please do resist." Midoriya said with a smile

"All For One." Mirio whispered as he heard those words come out of Midoriya's mouth

Mirio finally pieced together what was going on with Midoriya, All For One was trying to claw his way into a new body.

"Starting with you, come here quietly and this will all be over." Midoriya said as he walked over to Compress

"Don't get cocky!" compress said as he threw a small marble at Midoriya which decompressed into a large boulder

Midoriya placed his hand in front of him and disintegrated the entire boulder as it came into contact with his hand.

"What horrible quirk but it has its uses I suppose." Midoriya said as he brushed some dust off his clothes

"Shigaraki's quirk." Compress said trembling

"Let's say for a second that you win this war and achieve your goal. Be realistic what will you do?" Midoriya asked

"We will fix this society and set everyone free." Skeptic said

"Free? You want to use this freely?!" Midoriya shouted as he punched the air above him and split the clouds and cracked the ground beneath him, the amount of power in that punch could have killed anyone who stood in its way.

"This thing you want to release will only breed destruction!" Midoriya said

"It's a basic human right for us to use it and we have been chained by heroes!" Skeptic retorted

Midoriya shook his head and let out a sigh with a slight chuckle as he realized that no matter what he said the army would not back down.

"Well, no one can say I didn't try." Midoriya said with a shrug as he dashed toward Compress and punched him in the stomach launching him back.

Compress felt like one of his ribs shattered and soon began to cough up blood onto the concrete.

"Last warning. Please, just surrender and come quietly." Midoriya said to the rest of the villains

"DEKU!" Mirio shouted

Midoriya turned around to face Mirio and realized that he was in a fighting stance.

"I know he's inside your head, he's making you do things you don't want to do." Mirio said

"He is inside my head but this is my own choice, I realized when I heard that monster's loud footsteps that they were beyond help, how many innocents died as they made their way over here? The men, women, and children who perished it's my duty to their families to exact revenge for them. Hawks was right, some people are too dangerous to be kept alive." Midoriya said as he looked over at Gigantomachia

"STOP" Mirio said as he dashed toward Midoriya and clashed head on

The shockwave of Midoriya and Mirio knocked everyone backward. The ground beneath them began to crack.

"Stop this Lemellion! TOGETHER WE CAN SAVE EVERYONE!" Midoriya shouted as he pushed Mirio back with his air cannon

"Not like this." Mirio said

"Help us." The whispers begged

"Kill them all." All For One's voice echoed

Midoriya clenched his fist and slammed the ground tearing it apart and making a crater

"SHUT UP!" Midoriya shouted

The ground began to shake and tear as if an earthquake had hit them.

"Something is wrong, I refuse to believe Midoriya is in total control at this moment." Todoroki said

"I have to stop him, for now, take Shigaraki and arrest him and as for the rest of the villains, I think they are going to retreat for now." Mirio said

"Come back to U.A we will figure this out together." Mirio said as he walked up to Midoriya cautiously

Midoriya was back in control finally but it wouldn't last.

"I'm barely holding it together, It's too late for me but I know how to finally stop this endless fight." Midoriya said

Mirio had a bad feeling about what Midoriya was about to say.

"Give me one for all, I can stop it if you just give me that quirk. Trust me." Midoriya said as walked toward Mirio while extending a hand

"No I can't do that and you know why." Mirio replied

"Please you may not understand now but this is necessary to finally achieve what the original holder of one for all wanted." Midoriya said

"Master please come to us." Gigantomachia pleaded

Midoriya clenched his fist and looked over at Gigantomachia

"Your so loud." Midoriya said

It happened in a blink of an eye as Midoriya faced Gigantomachia and launched him back with an empowered air cannon.

"I'm not your master, so please be quiet." Midoriya said annoyed

Gigantomachia began to bleed out of his nose after that attack but even still he held no resentment toward Midoriya.

"As for the rest of you. Go back into your holes like the rats you are. You will not achieve your dreams this day. I will come for you all someday soon and forget about trying to rescue Dabi he's mine. A pity Twice died only for you to fail." Midoriya said as he made a shooing motion with his right hand

"DONT UNDERESTIMATE US!" Spinner shouted angrily as he dashed at Midoriya with two daggers in his hands

Midoriya sighed and turned around to face spinner who was coming toward him at high speed.

"STOP!" Mirio shouted

"DEKU!" Bakugou said as he ran toward Midoriya

"I told you it was your last chance." Midoriya said as he dodged Spinner and used a quirk that made his right hand into a blade and cut off the villain's leg.

"AGH!" Spinner shouted in pain as he looked down at his right leg which was cut clean off

"Kill HIM!" All For One shouted in his head

Midoriya's eye twitched and looked down at Spinner full of bloodlust.

"Wait!" Spinner said afraid

"So you do enjoy being alive?" Midoriya said with a scoff

Midoriya's raised his hand over Spinner ready to finish him off when he felt a large heatwave on his right. Midoriya looked in the direction where he had thrown Dabi only to be met with a large wave of fire.

FLASHFIRE FIST

"Son of a bitch I'm not dead yet." Dabi said spitting out some blood

Midoriya was launched backward and slammed against a wall. The right side of MIdoriya's body had been burned off and was now missing an arm.

"He won't get up from that." Dabi said with a smirk as he cauterized spinners leg to stop the bleeding

Spinner passed out from the pain and fainted in Dabi's arm.

"OI OI WHAT'S WITH THAT POWER, IS HE REALLY YOUR SON?!" Bakugou said as he looked over at Endeavor

"Someone go check on him fast, that amount of heat could have killed him." Endeavor said as he kept his eyes glued on Dabi

"This is turning into a mess." Mirio said

"And after all that power he showed off he was just another piece of garbage." Skeptic said

"Indeed." Compress agreed coughing

"Now then. Back to my darling family." Dabi said with a smile as he darted toward Endeavor

The sound of a helicopter could be heard up above as heroes landed on the site.

"Your all going to burn!" Dabi shouted as he prepared his ultimate attack only to be pinned down by wires

"It's good to be back." Best Jeanist said

"Don't forget about me!" Nejire said as she arrived

The villains were all pinned including Gigantomachia.

"You?! You're supposed to be dead! I SAW YOUR BODY." Dabi shouted angrily

"DABI!" Todoroki shouted as he launched himself toward his older brother

"It doesn't matter how strong your binds are." Dabi said as he burned his restraints to ash and ran toward Todoroki

At that moment many Nomu's began to pour out into the battlefield along with many other heroes.

"Save me Gigantomachia." Shigaraki's voice echoed

Gigantomachia broke free of the binding and ran toward Shigaraki's who was tied to a nearby tree.

Gigantomachia broke through the hero's line and made his way to his master. Mirio was preoccupied trying to fight off the Nomu and making a way for Bakugou to check on Midoriya.

"I can still give you orders." Shigaraki said with a cough as he was lifted by the beast

"Shit there's so many!" Burnin said as she tried her best to take out the nomu

Bakugou finally had a chance to go to Midoriya and nearly threw up at the scene. Midoriya's entire right side had melted away and there was a pool of blood surrounding his body.

"Midoriya." Bakugou said as he looked at the green haired teen

Rage and sorrow built up in Bakugou as he looked over at Dabi who was currently fighting Todoroki.

"Son of a bitch." Bakugou said as he looked at the villain who had a twisted smile

Bakugou was ready to go and fight Dabi when he suddenly stopped after hearing a familiar voice.

"Ahhh what a pain." Midoriya said annoyed

The dust cleared and everyone fell silent as Midoriya stood up and began to regenerate his missing right side. Fear fell upon everyone on the battlefield including Shigaraki.

"I gave you all one chance and you waste it just like that. Don't worry it will be painless I swear." Midoriya said calmly

Dabi had a look of horror in his eyes after seeing someone who he was sure he had killed alive and walking.

Multiple Nomu soon began to converge on Midoriya's location when they were suddenly turned into mincemeat in an instant by a simple wave of Midoriya's hand.

"Disgusting." Midroiya said

"Just die die die die. die already" Shigaraki said in a low voice

Shigaraki just didn't seem to get his way when it came to Midoriya and he finally snapped.

"GIGANTOMACHIA KILL HIM! I WANT HIM DEAD DEAD DEAD DEAD! RIP HIM APART!" Shigaraki shouted maniacally

Gigantomachia didn't want to hurt Midoriya but as long as Shigaraki commanded there was no stopping him.

"YES MASTER!" Gigantomachia launched himself toward Midoriya expecting to crush him only to be met by a blast of condensed air blast launching him back.

"GAH! I feel weak" Gigantomachia said

The anesthesia from earlier had finally begun to take effect, the efforts of the students in the mountain were not in vain.

Overclock

"How does it feel to be so weak." Midoriya said as he looked over at Gigantomachia

Midoriya jumped toward Gigantomachia and attacked with a quick fury of jabs. No villain or hero had ever seen Gigantomachia be pushed back so easily, this display of power showed everyone on what level Midoriya was on now.

Gigantomachia's defense rose as he was pummeled by Midoriya but to his surprise, he couldn't find an opening to attack, and with the anesthesia slowly taking effect he was slowing down.

"GRAH" Gigantomachia shouted as he launched Midoriya back

Midoriya was launched upward but used a floating quirk to stop his descent and began to watch the fight from below. Some class A students had arrived and were providing support.

"Senpai how is everyone?!" Tenya asked Mirio

"I can't tell you really, everyone is off fighting on their own. Hows Nejire?" Mirio asked

Nejire had been burned recently in the fight and was unconscious.

"The burns were not too severe. I'm sure she will be fine but I left her in the care of other heroes nearby." Tenya explained

"That's good, for now just help anyone however you can with your speed." Mirio said as he gave Tenya a friendly slap in the back

"I'm on it!" Tenya said as he dashed away

Mirio looked up at Midoriya who was simply observing.

"C'mon problem child you're stronger than him." Mirio said in a low voice

"Things aren't looking too good." Spinner said as he clenched his leg

Compress had snuck past the heroes and retrieved his comrade from custody in the mayhem.

"Don't worry as long as we have Gigantomachia nothing can stop us." Compress said reassuring his friend

"I guess you're right haha-" Spinner was about to say when Gigantomachia was suddenly smashed into the ground

Midoriya stood above the beast who was coughing up blood. The villains watched in fear as Gigantomachia writhed in pain.

"Master HELP ME!" Gigantomachia begged as he looked over at Shigaraki

Midoriya's cold eyes look down at the beast who was begging like a child and raised his fist to land the finishing blow.

"I'll use them all to put you down." Midoriya said as his arm began to distort and turn into a mesh of multiple quirks.

"Yes good, put this dog to rest. I know you want to" All For One said pressuring Midoriya

Midoriya looked down at Gigantomachia and set his eyes on the monster's head.

"This is the end." Midoriya said

Midoriya however was suddenly pulled to the side by what seemed like a black lasso causing him to miss his attack. The shockwave of the attack traveled up the road and created a large crater in the city center, it was as if a bomb landed on it.

"Who." Midoriya said in a dead voice

"Me Deku." Mirio said as he faced Midoriya

"You were going to kill him, he was down already." Mirio said

"He's a monster, you cant restrain something like this. You need to kill this thing before it kills you that's how we win!" Midoriya said in anger

"You don't even know what side your fighting for anymore!" Mirio retorted

"I know who I'm fighting for." Midoriya replied

Mirio kept up his defense and kept his eye on Midoriya

"I'm fighting for order! I'm fighting for the collective good of the people and if heroes want to get in my way they will be put down. Some criminals must not be allowed to live, don't you understand? What good will come of keeping this monster alive?" Midoriya said

If that's how you think then I have no choice but stop you Midoriya." Mirio said taking up a fighting stance

"Then I will take that quirk from you by force if I have to. I will break this cycle." Midoriya said as he walked toward Mirio

Mirio was prepared to fight but to his surprise Midoriya had avoided him and went straight for Dabi.

"This is the end, little brother! DIE!" Dabi shouted as he hugged Todoroki ready to burn himself and his brother to ashes

Todoroki prepared himself to be scorched until he felt a wave of air in front of him. Midoriya used air cannon to push Dabi backward

"Midoriya." Todoroki said

"STAY OUT OF THIS." Dabi shouted as he launched an attack at Midoriya who had gotten in the way of him and his fight with Todoroki

Midoriya ran into the flames head on and grabbed Dabi's right wrist.

"I'm in a bad mood right now sorry." Midoriya said as he broke the villain's wrist with ease

"AH!" Dabi shrieked in pain

"Touya." Endeavor said as he looked over at his son

"Give in." All For One said as he stood over Dabi's body

Midoriya closed his eye tight and opened them back up only to see All For One had disappeared.

"I'm seeing things." Midoriya said in a dazed whisper

Midoriya finally came to his senses and looked around confused as to what was happening but after looking at the faces of some of the heroes he knew what had happened.

"I'm sorry." Midoriya whispered

The heroes were finally closing in on the villains and began to dispose of the remaining nomu, restraining the rest of the league swiftly.

"Gigantoma-" Shigaraki was about to say when he was suddenly knocked out by Mirio

"That's enough." Mirio said

Gigantomachia was restrained after the full effect of the drug finally took over. Spinner, Skeptic, Shigaraki, Gigantomachia, and Dabi had all been arrested . The battle was a huge win for the heroes but only Mirio and a few others knew there was something else to worry about now. Midoriya was nowhere to be found and with All For One in his head, they began to fear the worst.

In an old safehouse.

Midoriya opened the door and was met by dust and memories. it was the main safehouse Stain and Midoriya had used in beginning. Stain's room was on the far right.

"revisiting old memories before you fade away?" All For One said cackling

Midoriya closed his eyes trying to ignore the voice and opened the door. everything was still in its place, blades, clothes, and money.

"What's going to happen to me." Midoriya asked as he sat down on the couch in the living room

"You're going to die. not in the literal sense, your body will be fine but your consciousness and mind will fade and Ill take over." All For One explained

"Why me?" Midoriya asked

"You were just a backup, Shigaraki failed miserably and although you are an incomplete and incompetent vessel it will do. I must say however your mental fortitude is astounding" All For One said

"no." Midoriya said clenching his fist

"no huh?" All For One said amused

"you're not taking over, I won't let you. Even if it kills me." Midoriya said firmly

"we will see Midoriya but when you do fail. I'm going to kill everyone you love with your body." All For One said in a sinister voice

Elsewhere

"if you have seen this person please contact the police or a nearby hero immediately." The news reporter said

A photo of Midoriya could be seen on screen on evert news station in japan. The photo on the screen only had two words.

Dangerous Villain

A reader by the name jadenyugi9 made an animation based on the fanfic and they put a lot of effort so go and check it out on YouTube!

A/N This chapter was long overdue im sorry, I hope you guys enjoyed it. I got a bit of writers block and I actually thought I got corona virus but it was just a really bad cold so I'm better now. I've finished my finals and have a bit more free time for now. Thank you once again for the animation JadenYugi9 :D

Mental States

Vigilance

Slaughter

Slaughter x Vigilance

Sixth Sense

Quirks

Kinetic strengthened Air cannon

All For One