AN: We had quite a few reviews this time, so I'll go over the questions here!
tiguylerobot: Yes, is like to think that they could do a combo attack of her charging his arm up using her earjacks! The problem with that would be that she also HEARS out of those jacks, so... the second she charges it up with a pulse, the ringing of the arm would likely deafen her. Needless to say, as powerful as it might be, Izuku probably would realize that this would hurt her, if not before but most certainly after using it once, and so at most they'd only ever use it that one time.
SentinalSlice: I don't believe he did. He was moving towards an external wall, which would likely be made of brick or concrete, and him slamming the arm into that isn't going to do noticeable damage to it. If he had placed his palm on it AFTERWARDS, then yes the wall would probably have some damage, but his initial charge up doesn't do much, if any, damage.
Entomoid: I'm not quite sure what you're trying to say on the first comment you left, on chapter 5, but I can understand 6 a bit better, so I'll comment on that! Yes, he could do that, but that would be breaking his promise with his mom, since he would be damaging himself to put a diamond hole in himself. If he wants to replace parts, then he's gonna have to get damaged naturally, and then get material custom fit for the damage he sustained.
The day after the break-in went as usual, with all of their daily regular classes that morning, right up until after lunch. Aizawa explained that today's heroics class would be on rescue, arguably the most of a hero's duties, and that it would be co-taught by him, All Might, and another teacher who he said would be a surprise.
Soon after they were loaded onto a bus, since the place they'd be doing the training was, while still part of campus, quite a ways away from the main school building. Izuku thought it a bit odd that they'd be doing essentially a field trip the day after a security breach, but at the same time this was U.A. and if they couldn't be confident in their security holding this time, who could?
When they finally arrived at an absolutely massive dome, they entered and were greeted by none other than the Space Hero, Thirteen. Izuku and the girl he saved during the entrance exam, Uraraka, both started gushing about how they were their favorite rescue hero, as Aizawa and Thirteen seemed to discuss something, probably about how All Might wasn't actually here. Izuku saw Thirteen hold up three fingers in response to whatever question Aizawa had for them, but he didn't know what that could mean. Was All Might going to be three minutes late maybe?
Izuku never got the chance to find out, as right then, a black, smoky portal opened up in the middle of the plaza ahead of them, and people started to step out of it by the dozens. Were they here as part of the training? Izuku was about to voice this question when Kirishima asked it himself, causing Aizawa to turn, tensing.
"No, they're not. Whoever they are, they've infiltrated U.A. uninvited, which means they're villains." Izuku startled slightly, they were actually getting attacked right now? As Aizawa ran down to intercept the horde, the villain made of black smoke teleported past him, up to where Izuku and the rest of the students were.
"Greetings, students. We are known as the League of Villains," the voice started, seemingly coming from all directions at once, "According to our information, All Might was supposed to be here today. Where is he?"
Thirteen stepped slightly forward and spoke up. "All Might isn't here. What business do villains like you have with him?!" At this, one of the other villains still down in the plaza, whose upper body was covered in... were those severed hands?- started to loudly complain.
"Really?! I bring my whole party, and the main boss doesn't even show up? No, this isn't part of the plan!" The man started scratching the back of his neck violently as he continued, "No matter, I'm sure we'll be able to draw him in if we give him enough incentive. Maybe killing a few of his students would do the trick?~ Kurogiri, scatter them, we'll be moving forward as planned."
As the smoke cloud, Kurogiri, started advancing on the students, Kirishima and Kacchan both leaped into action, attempting to attack the villain, but instead they simply... disappeared as they passed through the smoke.
"And now for the rest of you. Try not to struggle too much, okay?" Izuku knew he had to think fast as the smoke began to billow around them. The hand man said they were to be scattered, right? Izuku ran forwards, grabbing both Momo's and Mashirao's hands. He knew that these two were the ones he'd trust the most if they got into a fight.
Mere seconds after he grabbed them, the cloud enveloped the class, and his vision went black for a moment, before he felt himself start falling, slightly relieved that he could still feel the other two's hands in his. When his vision cleared, he realized they were quickly approaching the ground. With no other option, he shifted to keep his body so that the shards wouldn't hurt his friends when he shattered on the ground.
The landing damaged his legs quite badly, but he was quick to start the repairs as he thanked Momo for her quick thinking. She had created a few pillows in the second she had so they wouldn't land too hard, and this had kept him from shattering completely on impact. Now, however, they were faced with a new predicament: they were surrounded.
"The boss is paying us quite a bit just for killing a few kids, so that's some bad luck on your end, punks!" one of the villains called out as they started to approach down the street.
Izuku started panicking, since the enemies seemed to have ranged quirks, and he couldn't move fast enough to outrun their attacks, since his muscles were still damaged from the fall. Still, the three kids moved until their backs were against each other, ready to fight against an enemy they weren't even sure they could beat.
The villains slowly approached, seemingly as cautious as the kids were, and Izuku tried to think of why they seemed unsure. He realized a few moments later, and whispered to Momo.
"They don't know what your power is! Mine and Mashirao's are obvious, since you can see them, but they don't know what you're capable of, so they're not gonna attack haphazardly. That gives us time, but not much."
As he and Momo brainstormed how they could get out of this mess, a thought came up in his head. It was an idea to be sure, but he had no clue if it would even work. They had to try though, so he told the two his idea.
"Mashirao, I need you to keep using your body to block them from seeing what's going on between us. Momo, can you make me a sword out of your back, where the villains can't see it?"
"I... yes, I can do that."
"Perfect. I need the blade made out of obsidian, with a small circular slot near the base of the blade on the side. Can you make that?"
Instead of answering, Momo simply shut her eyes in concentration, and about ten seconds later, Izuku felt the hilt of a blade hit his palm the he held behind him. Let's hope this works!
Izuku quickly pulled the blade forward, and the villains took a step back at the sight, just as the blade flashed down, its inherent sharpness as obsidian, along with just the right angle for the slice, allowing Izuku to cut straight through.
The tip of his right pinky finger began to fall towards the ground, severed.