Izuku left the door first, holding it open for everyone else. They were all dazed and confused, some stumbling a bit as they exited the doors of the altered UA. Dimentio bragged to Izuku that he wiped their minds of the situation, which received an irritated glare from Izuku. Dimentio snapped, and UA returned to normal. Everyone else vanished, except Olive.

"Dimentio, where's Ochaco?" Izuku asked. "Didn't you capture her too? Or..."

"She did not die from Piper, nor any of my toys. But...she did die."

"What did you do to her?!"

"I did nothing. Did I not warn you to not touch my dolls? You failed to listen to the rules, and therefore pay the price. You killed her, Izuku. You shattered her to a thousand shards!"

"...WHAT?! You-you...Why?!"

"I warned you, did I not? It was your incompetence that caused her death. I need to fix her before I can restore her. But it is highly likely she did not survive~"

"Are you crazy?! She didn't do anything to you!"

"Did you not hear me?" He started to raise his voice. "I told you many times, you were the one who caused her death, not me! You decided to ignore my warning and shove her to the ground!"

They continued to argue, Olive watching. He looked at his hand, thinking about his duty. He had one duty. Izuku was going to fail, he knew it. He needed to end this now, before Izuku was killed.

"I told you to not touch my hard work, but you ignored me and-"

Olive's hand tore through Dimentio's chest, holding half of a black, cartoonish, heart. He pulled his hand back, holding the Chaos Heart and ignoring the black dripping from it. Dimentio fell to the floor, black blood pouring from both sides of the wound.

"Olive, what are you doing?" Izuku gasped.

"I'm doing what I have to do. He was just going to use you, Izuku. He was going to betray you, first chance he got. It's what he always does. He makes you think he's on your side, then turns on you when you're no longer useful. After all, it's what he did to me." His hand opened up into a claw, which pulled the half of the Chaos Heart into his arm. His hand returned to normal. "I had to, Izuku. I didn't want to, but I had to. It was the only way to prevent the death of you, and all worlds." The blue in his eyes melted away into pure darkness.

Dimentio slowly rose from the floor. "He is right..." Black dripped from his mouth and eyes. "I was...planning that..." He tried to cover the wound with his hand. "...So this is what death feels like...?"

Izuku sighed. "I wish it didn't come to this."

Olive grabbed his chest. "I wish it didn't either..." His legs started to shake, causing him to fall to his knees.

"Olive?"

He tried to go to Olive, but Dimentio grabbed him. "Wait...Something...feels wrong..."

Olive coughed, then threw up black goo. "Oh...Oh Grambi..." He covered his mouth. "What's happening? This wasn't what was supposed to happen..." The black goo dripped from his fingers, and every other bend in his robotic body. "W-wait...Who is that? Get out of my head!"

Dimentio seemed a bit startled. "The Chaos Heart? It can speak? It is a living being?"

The lights on his palms turned black. He froze entirely, no longer shaking. A thin arm tore out of his back, made of the same black goo that came from the Chaos Heart. Another followed, coming from the other side. The arms worked together to tear apart most of Olive's body.

"Well, well, well!" The voice echoed over itself, and it sounded like multiple people speaking at once; including Olive's voice. "A brand-new vessel for the taking...It's been more than a millennia since somebody put us inside an object. Seems like our prey has gotten smarter!"

Dimentio clutched Izuku's arm. "I cannot fight like this..."

The black goo completely covered Olive's face, the eyes and mouth now replaced by lights. It bore a small upper body, the entirety of it occupied by four arms and a circular glass pane that bore the Chaos Heart inside it. It resembled a centaur, with the black goo holding its limbs, body, and tail together.

It crouched down to grab Dimentio. "Another soul to devour! You were with us for quite a while, hm? You even split your power in half in order to ensure we survived..."

Izuku noticed Dimentio looked terrified. "Let him go!"

He charged One-For-All and punched it in one of its front legs. It smiled, then kicked Izuku into the school.

"Ohoho! Heehee! You think your Quirk can do anything? We're impenetrable without the Pure Hearts with you!"

Izuku rubbed his head. "Uhg...Dimentio, what are the Pure Hearts?"

Dimentio covered his mouth.

The Chaos Heart infused Olive tapped a finger to Dimentio's chest. "You were quite a loyal slave, weren't you? In fact, you were so loyal, we didn't need to do anything! Too bad you failed, though!"

Dimentio kicked around in its grasp.

"Oh, stop squirming around. This isn't going to hurt. You'll be dead in just a second if you would stop moving!"

Izuku tried to punch it again.

"We said that won't work. Why do you keep trying? Unless...you're trying to re-summon the Pure Hearts, aren't you? Oh, you little trickster, that won't do at all!" It grabbed Izuku. "Now you can die right by your buddy's side~!"

Izuku noticed it had a quirk of talking like Dimentio, but acting like Olive. Izuku figured that they had the biggest influence to the Chaos Heart, since it shared a half between them for eighteen years.

"But...oh? Right. Dimentio isn't your friend! He will never be your friend! He's nothing more than a heartless psychopath who gets amusement from torturing others!" It smiled. "And it's not like he's capable of making friends, anyway." It tapped one of its other hands to its chin. "Let's see here...How should we do it? Should we bite off your heads?" It bore its fangs. "No, too messy."

"Wh-what are you?" Dimentio stuttered.

"Us? We're the Chaos Heart!...Entity, since we have a real body now."

"Is this what happens when you find a perfect vessel?"

"Yes! We're surprised you didn't know that! What a silly little fool~" It crossed its free arms. "After all, you used us on Luigi. But you...YOU took control of it before we had the chance to do it ourselves! How are you able to do that?! You cannot be stronger than us!"

Dimentio was shaking.

"Leave him alone!" Izuku demanded. "Whatever you are, you're in my world, so you'll have to get through me to-"

"Oh, but your soul has no power we want. We have no need for greater power when we are already immortal. And we could probably throw you into the sun if you push us enough." It dropped Izuku on the ground, grabbing him by the ankle mid-fall. "Oh, but wait. We realize that he told you about the Pure Hearts. So since you know about our only weakness, we'll have to kill you anyway to prevent you getting to curious and seeking after them yourself."

"Izuku?!" Olivia yelled from below. "Izuku, what's going on? You never came back, so Olly and I got worried andnowyou'rehangingupsidedownintheairand-"

"Shhh..." The Chaos Heart Entity hissed to her. "Silence, child. We want to hear Dimentio's screams of terror as we tear out his soul. He's already missing a heart, so what's wrong with taking it the rest of the way? You're already halfway there!" It winked, tapping a pointer finger to its cheek.

Olly hurried over next. "Izuku! Is that Olive?"

The Chaos Heart Entity laughed. "Olive's body, yes, but this is our soul, and our mind!" It looked to Dimentio. "Did you really tell them nothing about us?"

Olly ignored Chaos Heart Entity and spoke to Izuku. "Give me a moment, Izuku! I'll go get help!"

It grabbed Olly by the collar, holding him next to Izuku. "Help? Oh, no. We don't do 'help' here. If you can't beat us on your own, then why even try? Are you really so weak that you cannot face your fears to fight a silly old centaur? If you're such a coward, then maybe you don't deserve to be king."

It grabbed Olly's crown with its last hand, crumpling it into a ball and watching it turn to ash.

"Disintegration touch," Dimentio muttered.

It tapped Olly's head repeatedly, mocking him. "Oh, are you scared now? Does fear fuel you? Seeing as how I can destroy with a single touch, I would be scared too, if I were you." It tilted its head upside down, frowning as to make the mouth a smile. "But your fear fuels us. Any negative emotion does. Your fear, Izuku's anger, Olive's pain, and Dimentio's sadness all feed us. We're already unstoppable, imagine how more powerful we can get, utilizing these...emotions."

It straightened out, fixing its head. It rubbed a hand across the glass on its chest and turned slightly to the left. A glitching Origami Castle was visible in the distance. Izuku figured out what it was doing. He had to stop it. It was clearly feeding off negative emotion, and was going to utilize Olly's anger and fear at once. Dimentio seemed to be thinking the same thing, as he bit the black goo between its knuckles.

It looked at him, unfazed from his fangs. "Oh? You really are a fool. You play your part well~!"

Izuku charged up One-for-All and examined the glass plate on its chest. The Chaos Heart sat behind it, beating slowly. If he could break the glass, the shards would hit the Chaos Heart. Damaging the heart directly might be able to stop Chaos Heart Entity, even if just for a second. If he was lucky, at least. The least it would do was throw off its aim. It tapped its fingers against the end of the glass, following the circular pattern with two of its fingers. The glass flipped over, making the heart inside look smaller.

It was a reflector.

It was going to completely destroy Olly's castle, his pride and joy, with some sort of attack, and the glass would increase its power. Izuku held out a hand, preparing a Delaware Smash. A small beam fired from the glass towards the castle.

"No!" Olly cried.

Izuku released the attack right as a larger beam followed. The Chaos Heart Entity staggered from the hit, which caused the glass to tilt a bit. The beam fired directly at the ground, then went back up as it fixed the glass. The castle was still hit, but it wasn't destroyed.

"Oh...It seems like we have stubborn little child here, hm? Heeheehee!" It dropped Olly and pointed to Izuku. "Hmph. An annoying little pest. But that's nothing we can't handle." It grabbed Izuku's cheeks with enough force that it could break his skull. "So you're the one who will die first, how fun~!"

Izuku charged another Delaware Smash.

It shook him. "Oh no you don't!" The black goo on its face tore Olive's face open, the face made of lights still floating in front of it. "Time to feel true pain and suffering, Izuku Midoriya."

A sort of pipe came from the hole in Olive's face and pointed towards Izuku's face. Izuku felt himself surging with pain, and his energy was being drained from him.

"NO!" Olivia cried. "Olly, we need to do something!"

"You can't," Dimentio sighed. "You cannot kill the Chaos Heart. Even if you could, it will still survive. It is the living version of chaos, destruction, anger, and fear. As long as those such things exist anywhere in the multiverse, it will just keep on returning."

"Don't talk like that," Izuku said, struggling to speak. "You were able to control it, right? So it's beatable. We just need to try."

Olly pulled out his sword, twirling it, and pulling it down in front of his face. The blade caught fire again. "Izuku's right. We need to try."

He ran to its leg and sliced at it. Chaos Heart Entity kicked him into a tree. It faced back to Izuku, and he could feel himself getting weak again. Izuku tore his eyes away from its face, looking to Dimentio. Dimentio had clearly given up, slouching in its grasp. His mouth wasn't visible on what he had left of his mask, and his eyes no longer held joy.

"Dimentio..." Izuku said as loudly as he could, unable to bring his voice louder than a normal volume. "Dimentio, you can't give up now."

"Why bother? We are all going to die either way. I told you many times, we cannot kill the Chaos Heart. Even if we did have the Pure Hearts, it has gotten too powerful. I can tell it has."

"But you're only making it stronger, Dimentio. You need to-"

"To what? Feel happy?" He scoffed. "I have not felt real joy in such a long time. I likely cannot even feel it anymore. Just like how I can no longer feel pain..." Cracks appeared on his side and cheek.

Izuku faced Chaos Heart Entity again. "Please, just take me. You've hurt him enough."

"No, no we have not!" Its face of lights became jagged and distorted, even glitching away for a second. "He ruined everything for us! So we'll kill both of you at the same time!"

Izuku couldn't feel his own body anymore. It felt as if he was being dragged away from his body. "But he kept you alive. Think about it. You would have been halved forever if Dimentio didn't keep part of your power with him."

"Your petty tricks won't work on me, Midoriya!" Its face vanished for a minute, Izuku catching his breath.

Olly was still trying to attack its leg, knowing full well that he was doing nothing but chipping his sword. Izuku charged another Delaware Smash, aiming it at the Chaos Heart again. Its face came back, and it grabbed its head with an empty hand. It was no longer smiling. It shook its head and smiled at Izuku again.

"Delaware Smash!"

He flicked. The force of his Quirk wasn't enough to damage it, but the glass tilted open just the slightest bit. Olly seemed to know what to do and flew up to Izuku's level. He adjusted his grip on his sword.

"Stun it again."

Izuku nodded.

It growled at Izuku and Olly. It tried to smack Olly from the air, but he moved swiftly out the way. It decided to toss Izuku at Olly, knocking him from the sky. Izuku landed on top of Olly, but quickly got off.

"Olly? Are you okay?"

Olly used his sword to stabilize himself when he stood. "I'm crumpled, but I'm fine. I've been through worse. I have an idea. Thank you for opening that gap. If we can stun it long enough, I can stab my sword through and destroy the heart. It's using Olive's metallic body as a shield. I wasn't expecting it to be such a coward." He stood straight and used his Fold of Life to fix some of his folds and creases.

The Chaos Heart Entity decided it'd had enough, and fired a beam at Izuku and Olly instead. The beam was crooked because the glass was twisted, but it still fired straight enough. Ashi suddenly ran in front of the two, holding up his hands. The beam hit a large metal wall instead of them.

"Ashi!" Izuku called. "What are you doing? This is dangerous!"

"And that isn't Olive," Ashi said. "I want my friend back. You need help getting through that metal? I've got you."

Kana ran past, transforming into Izuku. She prepared a position as if she was going to use his Quirk. The Chaos Heart Entity fell for it and tried to stomp on her. She dodged by rolling away. Netsu walked over to Izuku, Olly, and Ashi.

"Sorry we're late. We saw that huge beam and got worried for you." She looked to Olly. "Oh, nice to meet you, I'm Netsu."

Olly bowed, tapping a hand to his chest. "King Olly. I'm a friend of Izuku's. I have a plan to get to its chest. We need to destroy the heart to kill it. Think you can find a way to help?"

"Stop moving! You should be dying!" The Chaos Heart Entity grabbed Kana. "Why are you not affected by our-? Oh?"

Her Quirk wore off, and she turned back to herself. "Hehe, oops?"

It dropped Dimentio and reached for her with its now-empty hand. "Prepare to die. You are worth nothing in the end. You are so insecure about yourself, you turn to others. You think your Quirk is useless, which is why you borrow the Quirks of others..."

Olivia slammed the hammer into its leg, making it fall to its side. "Stop lying to her! I think she's adorable!"

It dropped Kana when it landed.

Olly took that chance to charge for it. It got to its hands and pushed off the floor, staggering as it tried to regain balance of its four legs. Olly ran up its front and stabbed the heart with his sword. His sword shattered and he was sent flying backwards. He landed on his side, rolling a few inches before stopping.

"You ignorant FOOLS! We told you that you can't kill the Chaos Heart! Although I do give credit for that creative tactic. Bravo." It clapped sarcastically. "Now you die!"

Its face tore open again and multiple wires came from the hole. They each grabbed a person, holding them out for Chaos Heart Entity to see. It reached two arms inside the hole, clanking and scraping following as it fiddled with things inside its head. It pulled its arms back out. A saw-like limb made of black goo came out its head, coming closer to Izuku.

A strike of lightning came from the sky, hitting Chaos Heart Entity directly in the head. It sparked, releasing everyone. Olly used Fold of Life in a quick panic, floating them all to the ground. He landed pretty hard, but everyone else was fine.

The Chaos Heart Entity fell to its knees, life gone from its empty face. The tear in its face vanished, and the goo retreated back into the neck. Olive's eyes turned back on, glowing blue.

"...Midoriya?" His voice was still distorted, but his voice was the loudest of the others. "Midoriya? A-are you okay? Ashi?!"

He tried to go to Ashi, but tripped over his own legs. He landed on his face, pushing off the ground with his main arms.

"What happened? Why do I look like this?"

Izuku went to him. "So, turns out that the Chaos Heart is alive...And it took over your body."

Olive forced himself into a smaller size, since the Chaos Heart Entity was a giant. "What have I done? I shouldn't have-"

"None of us knew that was going to happen," Izuku interrupted. "Not even Dimentio knew it could take over non-living material."

Olive looked at his clawed hands. "Am I going to be stuck like this?"

Izuku rubbed his neck. "Probably for a while. If I can find how to fix you, I'll definitely let you know."

Olive slowly rose to his feet again. "D-did I hurt anyone? Oh...oh Grambi. I'm so sorry! I-I have no idea what happened! One second, I feel faint, and then I blink and then I committed like...a million crimes!"

"It's fine, Olive." Izuku pat his shoulder. "I don't know how this happened, but it was hit by lightning. It seems like you were able to take back control while it was stunned. I don't know what it did to me, but I think I'm going to pass out again."

Olly chuckled. "Let's get the students back home. And we should check you and Dimentio for any injuries."

"Yeah."