The class entered the USJ, and was then greeted by thirteen. Odd name, Killua thought to himself. The pale haired boy honestly couldn't understand why hero names were so cringey. take all might, for instance. He's heard all about all might in the few days he's been here, and honestly? That hero name was begging for trouble. Flashy aliases? A literal taboo in the assassin's book. But who was he to complain? It's not like it affects him, so he'd suck his pet peeve up and just deal with it.

Everyone was wearing their hero costumes, and again, they're a tad bit too flashy in Killua's opinion. But everyone seemed to pull it off well, so he wouldn't complain. Killua, on the other hand, was wearing his black band tee and ripped jeans, as his hero costume wasn't made yet. No way was he going to wear that tacky gym uniform. Honestly, how was he going to improvise something as unfashionable as that? While the pale haired boy was listening to thirteen's explanation as to why all might wasn't present and dozing off at the same time, he felt a weird aura. No, it wasn't a nen user. But his assassination techniques were kicking in. "Stop." he said out of the blue, grabbing everyone's attention as everyone turned to see the pale haired boy, who's eyes were darting around the facility. Before anyone could question him, he continued. "Something- someone's here. Around the center of the facility," he said, voice stone cold and serious.

"What do you mean? There's no one he-" Aizawa was cut off by surprised gasps from the students, who were eyeing the center of the facility, a dark ball slowly forming. The pale haired boy got into a fighting stance, eyes cold and trained on the slowly forming ball. "Uh, is this a part of the training?" Kaminari asked, voice wavering and unsure. "No. It's not. Everyone stand back!" Thirteen said, stretching a hand out. As the ball got bigger, figures stepped out of it. Albeit, a whole bunch of them. For a second, the pale haired boy thought maybe it was part of the training, and they said it wasn't, to test their critical thinking. However, judging by the fact that Thirteen told them to stand back, a protective stance visible, and eraserhead having a fighting standby stance mirroring his own, he doubted it. Once the dark ball disappeared behind them, Killua activated his En to check the amount of enemies present. "They're all spread around the whole facility, there's around 10 in each natural disaster site, and there's roughly 53 of them in the center," Killua said aloud, knowing only his teachers and classmates could hear him. Aizawa and Thirteen were quietly surprised by Killua's capability to stay calm and even count how many of them there were, when the two adults themselves were internally panicking, thinking about the class' safety. However, they didn't voice it.

The rest of his classmates were scared out of their minds, and were staring at Killua when he told them the statistics of their situation. "Someone might separate us to the natural disasters place. Stay as close together as possible," Killua said quickly, knowing they didn't have much time until their opponents would make a move. That's when a man with hands all over his body and face spoke up. "Where is all might? He was supposed to be here!" he said, frustrated. Oh. So that's their objective. Kinda stupid, telling it loud and clear. But oh well, not like the guy was here anyway. It was then when Aizawa was running down to take the 53 villains head on, telling Thirteen to protect the students. Honestly, did he not listen to Killua's warning about being separated? Stupid decision, really. Didn't even try to make a plan. The pale haired boy clicked his tongue and shook his head disappointedly. All his classmates gasped as Killua disappeared from where he was standing and appeared right beside Aizawa who was running speedily and had like a 3 second headstart. Killua slowed down to Aizawa's pace when he was beside him.

"What are you doing! Get back to Thirteen!" Aizawa hissed, not even thinking about how Killua was doing all this. He was in charge of class 1A, and he couldn't let Killua get injured. It's is duty as a teacher anyway. "Shut up. You're an idiot. I said they were going to get separated anyway. Even if you are strong, you're outnumbered and you know it." Killua said pointedly as Eraserhead dodged attacks, knocking out a few villains with ease. Everyone back at the entrance were gawking at their teacher with awe, but that ended once Killua knocked twice the number of villains out in the same time. That's when there was a sound from behind them, a warp gate user showing up, and class 1A was dealing with their own fight.

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"Impossible! Who are you?! Where's all might?!" the hand-covered guy said, whining like a child. Honestly, were these what villains were like? They're weird. After knocking 26 villains out, Killua decided to take on that guy, who seemed to be the leader. He'd leave the other villains to Aizawa. The tired man proved himself to be quite useful, though he was showing signs of eye strain. Killua knew the ravenette would be in trouble if Killua wasn't there. After all, he learnt that quirks had their limitations.

The pale haired boy skidded to a halt in front of the guy with hands for a face, "So you're the boss?" he asked with a playful manner, completely ignoring the latter's tantrum and flood of questions. "Yes. Yes. Yes I am. And you..." before he could even finish, he was running to Killua at full speed, and Killua dodged with ease. That was until a huge.. A huge.. thing appeared. It was at least five times Killua's height, bulky, has crazed eyes, and it's 'skin', if you could even call it skin, was nonexistent from under its eyes and upwards, leaving it's disgusting, slimy looking brain completely exposed. It squawked like a dying bird. Albeit, a very loud dying bird. It charged at Killua, but the pale boy moved out of the way, sharpening his hands and making a clean cut for its arm, sending it flying off. One would think Killua would have an opening during this time, and he did. However, the pale haired boy stood in silent amusement as the thing's arm regenerated. Pretty cool, honestly, if he was under different circumstances. By the time this happened, Aizawa had finished off the remaining villains and decided to make a stupid move. He dove right into the battle. Again.

Honestly, can Killua really blame his teacher? I mean, he is looking out for his students. But on the strategic side, absolutely not. Did he really have a choice? Maybe. You'd never know. Aizawa's eyes went red, his hair floating above his head, meaning that whatever that thing is' quirk has been erased. But even so, it wasn't long before Aizawa's arms were snapped in an awkward position, earning a loud grunt from the ravenette. What's worse is that the boss touched Aizawa's elbow, which crumpled into dust due to his quirk, resulting in the pro-hero screaming in agony. So what Killua knows now is that this superhuman thing is called a Nomu, from what that crazy boss guy rambled about. The guy also mentioned it being made to take down All Might, meaning it has about as much strength All Might has. He also knows that the boss' quirk is some decomposing type, which can be activated through touch.

Then, from the corner of his eye, he spotted Midoriya, Asui, and Mineta spying in the pool right near the fight happening. Great. Now he has to make sure they don't get involved in this. The Nomu crushed Aizawa's head to the ground, and Killua quickly ran to Aizawa's side, once again ripping off the Nomu's hand. "Impressive, really. To be able to cut off my Nomu's arm. But you're no match for him. He can regenerate! And we will defeat All Might!"Aizawa was regaining his breath when the guy continued talking, "If All Might won't come here, I'll just destroy one of his precious students," he said with crazed eyes as the Nomu got Aizawa back into the bone-crushing position they were in a few seconds ago. The boss' head twirled, and looked at Asui straight in the eye, running in full speed towards her. Killua broke into a sprint, but a warp gate appeared, allowing the boss to get right in front of Asui's head in less than a second, forcing Killua to use godspeed to reach her. In a time crunch, Killua stretched his arms sideways in front of and the boss. The boss' hands touched Killua's shoulders, crumpling it like dried dirt, falling off and revealing lots of blood and some muscle fibres. Searing pain burned in Killua's left shoulder, where the impact was. Killua supressed a scream. It hurts. It hurts really bad, but not enough to make him scream. He was used to torture, but this was painful, even with all his training.

Midoriya, Asui, and Mineta looked wide eyed at the pale haired boy, mouths dry, heart beating fast. It was all happening so fast, and right before them their new classmate took the impact, which quite literally saved Asui's life. Seeing the shock in the boss' face, Killua took advantage of it to sweep him off his feet, doing the iconic neck chop to knock him out. Now all that was left was the Nomu and the warp gate, and some lingering villains that were scattered around the USJ. It was a lot, but they'd get rid of all the threats, one by one. Fist of all, the Nomu which was crushing his teacher who was bleeding everywhere. Yes, that looked like a good place to start. Killua ran up to it and punched the Nomu with full force, nenless, on it's side. To his surprise, the Nomu only stumbled a bit backwards, its hear turning to face the pale haired boy.

Yep. He's going to have to use nen. He was about to activate it when he heard Aizawa groan, "Ki-llua, get out of h-here," he said breathlessly, and Killua tried not to roll his eyes. The pale haired boy activated Ko on 100%, focused on his fist. He jumped from the ground, feet springing off the ground thanks to his nen, and was on eye level with the Nomu's head. Killua swung his arm and his fist hit the slimy, exposed brain on the Nomu's head. The impact of his nen sure did help a lot, as the Nomu was pushed about a whole 2 meters back with a loud thud. As much as the pale haired boy would like to beat the hell out of this abomination, his teacher pretty much had tons of broken bones, and Killua knew he didn't have much pain endurance training, despite his experience on the battlefield.

The pale haired boy ran up to his teacher, examining his wounds. Both his forearms were twisted badly, He had a few dislocations, and he's pretty sure Aizawa's skull has a few cracks. Quick on his feet, he shouted, "Midoriya, Asui! Get that branch from those trees! I need two of them!". Snapping out of their shocked state, the two (while dragging Mineta, who was scared out of his wits) quickly went to the trees, snapping branches. But that's when the Nomu came to strike again, and Midoriya ran up to it, screaming, "Smash!" while punching the Nomu. It had quite the impact, as the ground shook and wind there was a lot of wind coming from the sheer force of the punch. However, the Nomu didn't even flinch, and that's when the huge doors of the USJ at the entrance swung open, revealing none other than All Might himself. Asui had given Killua the branches, and everyone else was captivated by All Might, who was walking rather slowly and was babbling about something along the lines of "I can't believe it", "unforgivable", and "I am here!"

But Killua didn't have the luxury to even bat an eye at the approaching hero, instead deciding to make himself useful. He took off his newly bought band tee and tore it into two, each half being used to tie his teacher's arms to the branches, to keep the bones from moving and inflicting more pain than it already has to his teacher. Killua knows all too well that feeling, and rather not have anyone acquainted to him experience that. Luckily for Aizawa, Killua developed a skill in treating wounds, mainly because he always had to treat his own wounds, and Killua knew the exact position that would make it hurt at the minimum, and the pale haired boy could've sworn he heard his teacher sigh in relief once his arms were secure around the branches. By the time Killua was done, All Might was beside him, looking at his wounded teacher, nodding at Killua, saying he was 'very brave', probably thinking Killua was traumatized. But Killua couldn't care less right now.

Midoriya ran up to All Might, "All Might! This guy is dangerous!" he turned his voice into a whisper, but Killua's hearing is much better than the average human's, so he could hear every word Midoriya said. "I hit him with 100%, and somehow I didn't break my arms. It did absolutely nothing to him!". Okay, now Killua was curious. What was that? 100%? Oh well, can't bother to care right now. He'd bring Aizawa back to safety and not meddle more than he already did. Their supposed 'number one hero' was here, after all. "Midoriya, asui, Mineta, get back to the entrance where everyone else is. All Might should be able to take it down," he said calmly, propping his teacher on his back, to the amazement of his classmates. Well, they should've been able to at least guess the pale haired boy was strong, seeing by his now-exposed abs and muscles. Killua ran without godspeed, but was still faster than normal people can follow with the naked eye. In two seconds, he was on the top of the stairs, regrouped with his friends. He laid his injured and unconsious teacher down, and everyone was gaping at Killua, but quickly told him the status.

"Thirteen's quirk 'black hole' can suck everything. But that warp guy opened a warp gate in front and behind thirteen, so she was sucked by her own quirk," Uraraka said with concern lacing her tone. Killua wasn't used to this type of injury, so Killua bent down to see thirteen's wounds. Her skin was gone, revealing a lot of blood and muscle fibres, much like Killua's own shoulder. "Killua! Your shoulder! A-are you okay?!" Mina asked, horrified of the state Killua was in. "Oh my god," Kaminari said, who just saw Killua, "Are you okay man? Stay with us!" Kirishima screamed, wide eyed and worried. "Don't worry about me, I'm fine," Killua said in a calm tone, "Does anyone have cloth?" Killua asked, and Aoyama gave him a long scarf. Of course he had one for god knows what. It's literally not even remotely cold! But he didn't question it, moving to get some of the water bottles nearby that were initially intended to be for the class to drink after training. Killua unscrewed the cap, ripped the cloth in two, earning an offended gasp from Aoyama. Killua reached into his pockets, taking some iodopovidone that he bought the other day, because Killua always had to be prepared. It's a habit he's always had since a kid. Assasin and all.

He poured the iodopovidone onto Thirteen's back, earning a loud groan. He washed the wound with water, and quickly wrapped the longer half of the scarf around his teacher. Thirteen was gaining consiousness thanks to Killua, but that's when Asui and Mineta came up the stairs. "Where's Midoriya?" Killua asked them, Mineta was still scared out of his wits, and Asui answered for them. "He ran back to All Might. I think he plans on fighting," she said witha worried expression. "Stay here," he said, sprinting off back to the center of the USJ. There he saw All Might, Midoriya, Todoroki, and Bakugou. The three students looked lile they were thrown off to the side, two bad marks were on the ground, as it something heavy drove over it, breaking the ground.

The next thing Killua knew was that All Might was having a full on punching battle with the Nomu. Killua glanced over and saw who he suspected to be the warp gate user, as they had mist for a head, black with tints of purple in color. It was the same color as the warp gates he's seen today, so he decided to take down the villain's transportation. Killua ran, but to others it seemed like he dissapeared and reappeared right behind the mist man. Killua's fist coming in contact with the mist for a head, only to not feel his head, a surprised noise escaping his lips. 

At this time Bakugou came and threw the warp gate down by grabbing the metal plate he has on his supposed neck. However, right when the warp gate was on the ground, the Nomu fell unconscious as on the ground with a loud thud. The warp gate sighed, "The Nomu and Shigaraki are both defeated. I guess it's time to retreat," as he said that, warp gates appeared right under himself and their boss, who was 'Shigaraki', Killua assumed. However, Bakugou wasn't very pleased with the idea of letting the warp gate go from right under his hand. He aggresively pulled the warp gate from the ground, which was now a warp gate. However, the mist guy's hands shoved Bakugou's hands away, which caught him off guard a little. The warp gate took this chance and completely fell backwards towards the ground, sinking into the gate of his own quirk. 

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A/N

AHA! FINALLY ITS DONE

okay so as I said last chapter, I'm going to make longer chapters. Though the next chapters wont be as long as this one, I just wanted to put the whole USJ fight in one chapter, which ended up in being 3k+ words when i usually make less than 1k :")

So yeah I haven't uploaded in a while bc of this long chap 

- van.