Heyo so I couldn't really think of anything for my other story, but I had some ideas for this one so guess I'm going to need to change the description, ugh so much work.
Anyhoo enjoy and critique.
It was late when Izuku left the hideout, he made sure to destroy the cameras and burn down the hideout.
Why?
What kind of hero ignores a fire?
Izuku waited until a big man ran onto the scene, and just stood there dumbly while he waited for backup.
Death Arms, Izuku always saw this idiot hanging about, he was useless against things he couldn't punch.
And Izuku had 5 minutes to take him, it should be easy, a quick jab and boom.
Izuku sneaked up behind the hero and jabbed.
His hand penetrated, barely, and he didn't absorb him.
Izuku got smacked into the wall before he could even theorise why it didn't work.
"Hey I know you, what's the big idea?" Death Arms approached.
But now Death Arms had seen his face and this could ruin all Izuku's plans.
Izuku quickly recovered. He had to kill Death Arms, absorbing or not.
"I'm sorry mister, he told me to attack or he'll kill my sister" Izuku lied as he produced fake tears.
A softer expression replaced the battle ready Death Arms.
"Who did? Can you tell me where he is?"
Izuku backed away, putting in a facade of fear.
"He-he's right behind you!" Izuku screamed.
Death Arms turned around.
Izuku lunged at his legs.
Death Arm's scream of anguish echoed through the night as he got grabbed from behind by the knees before getting pulled back, bending them inwards and breaking them.
As he crawled around on the floor, he looked around for the guy the kid was talking about, only to see the kid looking at him with apathy.
"Woah that was easy, now let's see if this works" the kid jabbed his hand into his abdomen.
"Nope, guess I just have to kill you, that's unfortunate" Izuku jabbed again and again, death arms flailing around, hitting Izuku a couple times as Izuku's arms would break before quickly coming back together and continuing the assault.
"Ahh so there's a method to this, it seems I need to have some sort of advantage over you in order to properly absorb you" Izuku said as tendrils stabbed Death Arms and began to eat him from the inside.
It was a big meal so it was slow. Izuku had to cover Death Arm's mouth to stifle the screams.
However, eventually Izuku just ripped his throat out so he couldn't scream.
And Izuku experienced a life where everyone congratulated him on such a strong quirk, made for heroics, he experienced the grateful expressions of those he saved as well as those who paid him to do some rather unheroic things.
Then he saw him getting stabbed over and over by the hand of the smiling teen he thought he was saving.
"Huh, so you took bribes? not surprising, but thank you for the information, I will put it to good use" Izuku spoke to the remaining blood stains that were currently getting licked up by his greedy tendrils.
Izuku looked at the tendrils, he could feel them, he knew he could control them but not completely, like when you burn your hand and move it before it registers in your brain, like a reflex.
"This needs experimenting, who knows what else I can do, I can start tomorrow after I sleep" Izuku said as he heard sirens from behind.
"I'm definitely late for my curfew, but Mom is used to me coming home with bruises, she would probably assume I just got beaten unconscious again" Izuku stated as he left the scene.
On the way home, Izuku noticed that he was moving with more effort, and felt like he was wearing a full set of armour.
"Hm makes sense, I'm abs..consuming full grown people, of course I'm heavy" Izuku tried to jump to see how it'd feel with all the weight.
And of course he tried his hardest with all the weight.
Biomass swelled in his legs as he jumped almost over an apartment building, landing on the roof and cracking it.
Izuku almost screamed into the night in excitement, but held, last thing he wants is to wake people up.
Izuku walked to the edge and let himself fall onto the ground below, breaking a piece off of the curb below.
He tried to recreate his jump while he walked, though not getting as much height, although it was still high.
It was only when tensed his leg 'muscles' that he jumped way higher again before landing doing his best to not leave cracks.
"So my muscles work differently now?" Izuku tensed his arm and was amazed when tendrils surrounded them. He tensed his fist and the tendrils went there, piling up till Izuku couldn't even properly lift his arm until Izuku quickly distributed the weight throughout his body and arms.
He went towards a car and tried to pick it up. He underestimated how strong he was and ended up flipping the car over and through a window.
"Oh shit!" Izuku couldn't risk being caught so he ran, easily getting out of sight.
It was only when he tried infusing his legs with the tendrils that he began to really speed up as bits of biomass began to propel him forwards.
He eventually had to stop as cracks began to form on the pavement he ran on. But he was close to his house and so he walked.
When he went through the door he quickly went to the bathroom.
Looking in the mirror he did notice he was a bit pale, he looked like he was dead honestly, which fair enough he did kill himself.
Izuku went to take a shower to wash the blood off, but he noticed that it was gone, even his school uniform was clean, not even a wrinkle.
'Did my quirk do that?'
Izuku took off his school uniform, well he tried to.
It was like it was glued to his skin.
Subconsciously, Izuku began to want to take off his shirt and just like that.
The shirt receded into his body.
"Interesting" Izuku thought of his T-shirt and boom, he was wearing it and he began to test out his shapeshifting capabilities.
An hour passed by the time Izuku went to his room, he noticed the bottles around the place, his mom wouldn't have noticed if he was in or not so he was safe from any interrogation from her.
It was the weekend so Izuku decided to dedicate it to training his quirk, and where else but the quirk fighting arena's that Death Arms ignored for a handsome fee, it was so big, even some of the men from the hideout knew about it.
"I'll get to train my quirk and get stronger at the same time" Izuku smiled as he went to sleep.
And after a another hour.
"Goddamnit"
Izuku realised that he wasn't tired nor did he even feel the need to sleep, and so he decided.
Why wait till tomorrow to train his quirk?
Quickly changing into some jeans and a green hoodie, Izuku wrote a note for his mother so she would think he just woke up earlier and went out, she didn't really care what he did as long as it didn't get the police involved.
Izuku went back out and decided that a kid in an arena will bring up some questions and so he changed his appearance appropriately to that of one of the gunmen that had been in the crowd at the fighting ring so Izuku had a rough idea of what to wear.
When Izuku arrived at the entrance he knew he'd have to knock 3 times on the too right corner 2 times on the middle then once on left corner.
After that the door opened, Izuku didn't have any memories of a fighters perspective and so he went around looking for someone to give him directions, and eventually found a fat bald man with a bushy mustache who was more than happy to point him in the right direction.
And so he changed his clothes to a simple pair of combat pants with a vest as he approached an entrance booth where he wrote a fake name and quirk.
A couple minutes of waiting later and the announcer spoke.
"Hello ladies and gentlemen, we have a special event tonight, we have our reigning champion 'Zeus' against Newcomer 'Merciless'! Place your bets and have a good time" the announcer spoke with glee.
"For the rules, there are none, 2 people enter, one leaves, the messier the better!" he screamed.
Izuku himself didn't like the name 'Merciless' but it would have to do.
Izuku walked into the ring as the door slammed shut. He looked at the man before him, even in Izuku's adult size, this guy still towered over him.
"And Fight!" The guy instantly blitzed to Izuku, slamming him into the gate's side, before grabbing Izuku's leg and ripping it off.
'fuck, this guy moves too quick, and he's too strong!" Izuku saw the man rapidly approaching him from the air.
Izuku pushed himself up.
'if I can't hit him, I'll guarantee he hits me' Izuku let his biomass swell in his chest as he took the hit from Zeus, fracturing the fist as it came into contact with the hard surface that Izuku produced.
In the time Izuku bought himself he grabbed the wrist and twisted.
Before Izuku could go for a follow up, he got grabbed by the throat.
"Ok you put up a crap fight, but no worries it's all meaningless anyway" Zeus said as he slammed Izuku into the ground and laid into him, punches cracked the floor below whilst destroying Izuku's face.
And honestly it was pissing Izuku off.
Izuku's arms were being held down by the feet of Zeus and so.
"Ahh motherfucker" Zeus screamed as he got stabbed through the foot by these spikes protruding from the arms, enough that he got off.
Izuku learned to not let up and so he jumped above Zeus and used his weight to force him to the ground and keep him there.
"My turn" Izuku smiled as he poured biomass into his arm swinging it up before letting it fall onto the face of Zeus, breaking multiple bones, and he did it again and again, not stopping till the crowd began to slow their clapping.
He then stabbed his arm into Zeus and revelled in the shock and fear he caused as he consumed him in front of them all.
"You want more? I can fight all night!" Izuku shouted as the brutality spurred the crowd into a bloodthirsty shout.
The next couple hours Izuku spent ripping and tearing people apart, their quirks were pretty useless against Izuku while the crowd screamed in delight.
"More"
Izuku ripped off arms and shoved them down throats.
"More"
He ran the opponent into the fence over and over till it began to cut him then kept going till he come out the other side in pieces.
"More"
Izuku beat the guy to death, apparently he had a healing quirk but eventually he ran out of energy due to the pure punishment Izuku was wrecking on his broken body before he consumed it.
"MORE"
"Sorry but we're out, come back next week or visit one of our other fight clubs" the announcer replied.
Part of Izuku wanted to kill everyone in this place, but that wasn't a good plan long term, perhaps he could come back at some point later and then have his fun.
"Ahh hello there Merciless, that was an amazing display of brutality and you truly have gone all night" the bald guy from earlier came to him.
"If you ever want to work for me, you would be an asset" he said as he offered Izuku a card with a phone number.
"Call this and I can guarantee the world will be your oyster" he added with a smile.
Izuku looked at the card "I'm not a grunt" Izuku dropped the card as he began to leave.
"That's a shame, guess you're quirk will be useful to him" he said as he pressed a button.
Izuku walked down the hall, but then he appeared in a dark room with wires everywhere.
"Hello, the good doctor sent me footage of your fights and I don't say this often but I am really interested in your quirk" a figure of at the far side of the room said.
"Let me out and I'll probably not kill you" Izuku said as he rushed the man but it seemed like he was on a treadmill as no matter how far he went, he stayed in the same place.
"So you are one of these types, regardless I like your quirk and I want it" the figure raised his hand as Izuku immediately began getting pulled towards him.
Izuku jumped at the right time as he flew over the man who now that Izuku had a closer look, he had a scarred face.
That was all Izuku could see before he got impaled through the legs and arms.
"So from what I can tell, your quirk makes you stronger, durable and even gives you the power to heal lost limbs" the man listed the abilities he'd seen Izuku display.
"It's almost like you have multiple quirks, and that's a lot coming from me" he chuckled.
Izuku was panicking, everytime he moved another pole would come out of nowhere and impale him again.
Izuku began to feel an off presence about this guy, it was only now that he realised that this guy had just displayed three different quirks, one with the illusion, one with the force that pulled Izuku to him and now one that had summoned poles to stab Izuku.
"What the fuck are you?" Izuku asked as he ripped his arm out the poles, only to get stabbed again.
"I go by a couple aliases, but you don't need to know that, however I need to know your address so I can properly dispose of you when I'm done" he went to place his hand on Izuku's head.
"Fuck off" Izuku ripped his leg off the pole and used what was left to kick the man in the chin.
He ripped himself out fast and began jumping in random places while he began to heal, not staying long enough in one place to get hit by the poles. Izuku kept moving around but everytime he would attack he would get end up getting pushed back by some force.
"You're strong and smart, you will probably be a good high end" the man began to mutter.
Suddenly 4 red and black spikes caught his leg and suddenly his quirk stopped listening to him, just long enough for Izuku to get impaled.
"Now this is a useful quirk for those like you" he commented as he flexed his fingers, the red and black spikes returning to his fingers.
"but it's your quirk that I think will be my new advantage over him". He approached Izuku who tried to fight against the poles but he just got more poles.
However that didn't matter. A hand laid on his face.
When it was removed Izuku felt tired. Was this it? Was this death?
When he looked up he saw the man twitch uncontrollably as he fell on the ground. He dragged himself to Izuku and forced his hand onto Izuku.
And just like that the tiredness was gone and Izuku used his strength and pushed himself through the poles again where he watched the villain recover, Izuku should've attacked right then but the overwhelming fear that he felt stopped him.
This person took his quirk and for some reason he gave it back.
"You truly have a powerful quirk, so powerful that my body can't contain it...yet" the man laughed as he raised his hand.
Just like that Izuku was back at the arena hall, he fell to the side where he began to process.
This guy took his quirk, couldn't contain it, so he gave it back and will eventually come for it when his body can contain it.
Izuku huddled up to the side.
"Hahahaha" Izuku's laughter echoed as he began to recover from the side.
"He's going to wish he suffered with my quirk, because now I'm going to make it so much worse, I'm going to rip his skin off and strangle him with it" Izuku laughed as he punched the walls, cracking and breaking them.
"I'm coming for you, you quirk taking bastard. Kacchan can wait"
Heyo so what do you think, when it comes to strength scaling, I'm horrible so there may be a couple times where Izuku wins against one person but loses to a weaker person, in that case just ignore this, I'm going for dumb fun rather than a super detailed story.
However this may be sporadic so don't expect consistent updates