A/N: Before we get to the chapter, I would like to clarify something. The inconsistency of how I write others thoughts and Kazuto speaking to himself. The reason for this is because I wanted to show his state of mind from years of loneliness. While normal people just think in their head, Kazuto acts like he is speaking to an imaginary friend. The only reason he doesn't say it out loud is because everyone will think he is crazy.
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Kazuto walks towards the entrance of the practice centre, with his hand on the hilt of his katana at all times. A man in astronaut suit was waiting for them.
Midoriya immediately went "Oh my god! It is the rescue hero: No. 13."
No. 13 said "Welcome kids, I will be taking the class along with Mr. Aizawa. Follow me." and opened the gates to the practice centre.
They walked into a huge dome which looked like a movie studio with multiple sets of different locations. It had a central area with a fountain, a section with completely destroyed buildings, another section with a huge water slide and a ship in a lake, and so on for emulating different scenarios.
No. 13 went on to tell about the practice centre and USJ and explained how quirks could kill people when you aren't careful.
As soon as No. 13 was done with her speech, electric sparks spread through the lights in the dome and power across the practice centre died down.
"What a punctuality? Like they say, being evil is also a duty you should perform with discipline." Kazuto said in his head.
"What's happening?" Kaminari asked.
Kirishima said "Don't tell me it is another training planned by Mr. Aizawa."
Aizawa shouted "Gather around and stay behind me. This is not a drill."
Aizawa was staring at the purple-black cloud in the centre area from which people started walking out. The one that stood out is a kid with light blue hair and weird hands all over his body, one even covering his face.
Aizawa said "Those are real villains. No. 13 take care of the students."
Midoriya immediately said to Aizawa "Mr. Aizawa, you can't fight all of them at once."
Kazuto said "Kaminari, see if you can contact someone outside."
Kaminari nodded. Kazuto then turned to Aizawa and said "Mr. Aizawa, there are villains scattered all over the practice centre in different zones. It doesn't make sense unless they plan on scattering us.They also knew when to get to this centre, so they know our class schedule and who is going to be here. I would like to request permission to allow us to fight."
Aizawa immediately turned him down "No. Even if it sounds logical, you all are overestimating your abilities. Fights with villains are life and death battles. If you make one mistake, you can die."
Aizawa immediately jumped down and headed towards the centre area. Kaminari, who tried contacting with someone outside, said "Kazuto, I can't contact anyone. Someone is jamming the signals."
Kazuto said "This means they want to keep us here and not call for help. Also, they made sure they didn't trigger the alarms, that means it isn't an all out attack on our school. Only this centre has been attacked. Iida, I want you to go and get help."
Iida replied "You want me to leave all my classmates here and run away from danger."
No. 13 said to Iida "Your class rep is right. Looking at their numbers, we will be at a disadvantage the longer this goes on."
Iida clenched his fists, debating on what to do. That's when a weird purple-black cloud appeared near the entrance.
Kazuto turned to the cloud and everyone else did the same. The cloud took the shape of a humanoid figure, with glowing yellow eyes.
The cloud, Kurogiri, said "We came to UA to kill All Might, but he isn't here. Is there some change in the schedule? Even if we can't kill All Might, killing his students will deal significant damage to All Might and the image of UA."
No. 13, being the pro hero he is, opened the cap at his fingertip, intending to use his quirk, when two idiots charged at Kurogiri.
Bakugo let out a huge explosion at Kurogiri and Kirishima hardened his arms, ready for close combat.
Bakugo shouted "What are you talking about? I will kill you."
Kirishima said "Do you think we will just let you do what you want."
Kurogiri said "That was dangerous. Even though you are high school kids, you are still UA students."
"These idiots, don't they even think once." Kazuto said out loud and Bakugo immediately shouted "Do you want to die too?"
Kurogiri didn't waste time and immediately spread out his black fog around the students. No. 13 couldn't use his quirk due to Bakugo and Kirishima standing between him and Kurogiri.
Iida reacted in time and saved Uraraka and Sero. Kazuto didn't try to escape because he wanted to be teleported away from No. 13. "The teachers won't let me fight, so getting teleported away is the best option. By the , Aizawa will either be partially or completely overpowered by Nomu. I can have my battle till All Might gets here." Kazuto said in his head as he slipped into a portal hole and landed in the mountain zone with Momo.
Momo and Kazuto landed on the ground and were immediately surrounded by villains. Momo immediately got up and made a metal pole, ready to fight.
Kazuto got up and said "Momo, let me handle this. Just move far away from me. I still can't turn off friendly fire with this thing."
Momo looked at Kazuto and seeing his confident look, she said "You have to let go of my arm for that."
Kazuto let go of her arm and chuckled nervously. Momo ran far away from Kazuto and a villain nearby shouted "Trying to act all brave in front of a girl. Too bad, you are going to die today."
Kazuto said "Here comes the cool walk." and started walking towards the villains casually while humming the background music of one piece. When he was close enough, he released a huge burst of haki out.
A villain said "What.... is.... happening?" before fainting. They felt like someone turned off the switch to their brain. They lost their will and fell to the ground lifelessly.
Kazuto turned to Momo and and walked towards her. When he got closer, he saw that she was trembling. Momo asked Kazuto "What was that?"
Kazuto replied, "Another thing I can do with my quirk. Now come on, we need to get to the entrance to help Aizawa and No. 13."
Momo knew Aizawa asked them not to fight, but in the current situation, where the villains came prepared to face All Might, we need to work together. So, Momo nodded and they started running towards the centre area, when a hand popped out of the ground behind Momo.
A man appeared behind Momo. Kazuto immediately sensed this and charged at the villain, but villain was close to Momo and took her hostage.
The villain said "Careful kid, if you do anything suspicious, I will electrocute your girlfriend to death."
Kazuto didn't want to waste time with this mob character and said "You should've stayed in the ground."
Kazuto charged at the villain, who couldn't even follow Kazuto with his eyes. With the hand holding Momo, he decided to electrocute her, take her with him.
Momo, being the smart kid she was, made an insulating material over her skin. Electric sparks from the villain's hands couldn't do anything to Momo. The villain was immediately met with a punch to his face, sending him flying into a rock nearby.
Kazuto said "Momo, we have to hurry. We can't waste time here."
Momo stood still and said "Kazuto, this incident showed me that I am not yet ready and will only get in your way. So, I will go to assist others. You do what you must."
Kazuto could tell Momo thought this through and nodded. He ran towards the centre plaza with his maximum speed.
Meanwhile, in the centre plaza, Aizawa was dealing with multiple villains coming from different directions. The fatigue from fighting multiple enemies and the side effects of using his quirk extensively were visible. His movements were getting slower and he was taking longer breaks between each activation of his quirk.
Shigaraki, the kid with the hands, studied Aizawa's patterns and started his countdown from when Aizawa last deactivated his quirk. Shigaraki started running towards Aizawa and continued counting down "15...14...13...12..."
Aizawa saw Shigaraki come at him with his hand extended and dodged his hand, countering with an elbow strike to Shigaraki's abdomen. Shigaraki, who has been studying Aizawa's attack patterns, predicted this and already had his other hand there ready for Aizawa's counter.
Aizawa's elbow touched Shigaraki's palm and all five fingers closed around his elbow. The skin around his elbow strangely started crumbling and it was followed by the muscles below.
Aizawa reacted in time and before he suffered permanent damage, he erased Shigaraki's quirk. Shigaraki smiled and jumped back, dodging a punch while also retreating to let the villains handle the weakened Aizawa.
That's when Kurogiri appears beside Shigaraki. Shigaraki asks "Kurogiri, did you kill No. 13?"
Kurogiri replied "I did manage to immobilize him, but a kid got away. He might call for backup."
Shigaraki said "Even we can't win if a lot of pro heroes show up. I guess it's time we end this."
Aizawa, who was fighting villains, felt a shadow loom over him and turned around. Shigaraki started his usual villain explanation "See eraser head, we were not the final boss, he is. He is an artificial human specially created to kill All Might."
At this exact moment, Kazuto reached the centre area, but didn't attack. He observed the situation and said "Exactly as in the show. Now, if I need to handle this properly, I can't blindly charge into battle. Sorry Mr. Aizawa you have to take few for the team."
Kazuto then saw Midoriya, Asui and Mineta in the lake of the shipwreck zone. "Yes, they will be the perfect distraction." Kazuto said in his head.
Aizawa looked at the Nomu and threw a punch at it, which it caught effortlessly and snapped Aizawa's arm like a twig. Aizawa screamed in pain, but still had his quirk active and looked at Nomu.
The Nomu caught Aizawa's head and slammed his face to the ground. Shigaraki explained "His strength is not from a quirk. Anyways, we are going to have to end the game now, but not before killing a few students."
Kurogiri immediately opened a gate to where Midoriya, Asui and Mineta were. Shigaraki appeared before them and his hand reached out to Asui.
Midoriya thought 'Tsuyu, she is in danger. Come on move. Think about the egg not exploding. Think about the egg not exploding.'
Midoriya went for a punch, aiming for Shigaraki's face. Kurogiri, being the loyal Nomu he was, teleported Nomu to Shigaraki to protect him.
Midoriya'a punch hit the Nomu and it was followed by winds from the change in wind pressure from his punch.
"Now" Kazuto said and charged into the area with all his strength. The first thing he did, he went for Kurogiri. Before Kurogiri could even see it coming, he felt a blow to his metal plates that act as his neck.
The purple-black fog cleared around his body and it exposed his humanoid form. Kazuto didn't even waste a second and landed a heavy blow to his chest. Air escaped from his lungs. Kazuto didn't let up and delivered a punch to his gut and Kurogiri's body arched up. Kazuto then landed the final blow, a hammerblow to his back, slamming hom into the ground. Kurogiri's body literally bounced when it hit the ground. Kurogiri didn't even know what hit him and he was out cold.
A dust cloud rose from the final attack and the same was with Midoriya and Nomu. When the dust cleared, Shigaraki asked "That was dangerous. You said smash, right? Are you also a fan of All Might?"
Midoriya looked the the tovering nomu in front of him and trembled. "That didn't do a thing. Is that why they were so confident that they could defeat All Might?" Midoriya mumbled.
Shigaraki couldn't hear Kazuto fight due to the air pressure from Midoriya's punch. Shigaraki turned back at Asui when he heard a voice "Oi idiots. Your escape route is closed."
Shigaraki turned around and saw a kid with red hair and weird clothes stand next to Kurogiri's unconscious body. Kazuto said "It is time to face the mini-boss before you get to the main boss."
Shigaraki shouted "Nomu! Kill that kid."
The Nomu immediately charged at Kazuto with all its strength. Now, the Nomu is able to handle the current All Might at 100%. The current All Might is injured and is 60% weaker than in his prime. So, of we are talking percentages, the Nomu's strength is around 40% of prime All Might's strength. Kazuto's strength is 50% of current All Might's strength, or 20% of Prime All Might's strength.
The Nomu was twice as fast and strong as Kazuto, but he wasn't scared. His hands trembled, not from fear, but from excitement.