Sorcerer In A Hero's World (Jujutsu Kaisen X My Hero Academia)

I DO NOT OWN JUJUTSU KAISEN OR MY HERO ACADEMIA

"HRAAAAAAAAGH!" I shout as I throw a full force punch at Kirishima who's quirk nearly falls apart just from me and Ojiro's attacks. I can feel my hands shaking just from continuously punching Kirishima, I can only wonder how Ojiro's tail is feeling right now. "Keep it you guys!" Kirishima eggs us on as the two of us continue attacking him. "I get how this is supposed to help the two of us, but how is this helping you Itadori?!" Ojiro says as he smacks Kirishima with his tail, causing him to stumble backwards.

"I guess if I'm able to make my regular strength stronger then when I use my quirk it'll be even BETTER!" I shout as I punch Kirishima in the stomach. "What if your fists start getting all messed up?!" Ojiro asks me. "They'll be fine!" Ojiro shoots me a look that says "how?" but neither me or Kiri answer him cause if we did we'd have to tell him the entire story.

After what feels like hours of punching the hell out of Kirishima I suddenly hear someone shout my name. "Itadori!" I turn towards the voice and see... oh boy it's Aizawa sensei. I know he was gonna be here to tell us what to do for our training, but I was hoping he didn't try talking to me today after what he told me yesterday. I walk over to him as points towards a part of the mountain nobodies training at. "I want to see that ability you told me about. Piercing Flame." Seriously?! He could've had me do it at night time or something, but now of all times?! What if somebody notices me creating fire and shooting it like an arrow and starts asking a million questions?!

"Ok..." I tell him as the two of us walk to the empty part of the mountain that nobody seems to be at. "You've only used that ability once right? When you saved Midoriya from that Nomu during the Hosu attack." Does he want me to get better at using it? "Yeah. The way it worked on the Nomu was that when it pierced its body it almost immediately spread all around its body and burnt it to a crisp so all that remained was its ashes." Aizawa sensei hums in understanding. "Have you used your fire ability to do anything else?" He asks me.

"The only thing I've used it for is redirecting Todoroki's fire when he shoots it at me, I actually used that against Stain which surprised him a good bit." I smile at the memory of taking down Stain alongside Todoroki and everyone else. "Have you tried to use your fire on only your fists? I don't really understand Cursed Energy, so is it possible to use those flames alongside your Cursed Energy to create a stronger attack?" Huh... I never really thought about that. I've never figured out if this fire is just Cursed Energy or I can create regular fire.

"I mean... maybe? This ability isn't mine, so I don't really know how to explain the flames." I look at my hands as I create fire on one of them. "It doesn't feel hot when it's on my hand..." I say as I touch the flames with my other hand and feel nothing but a slight warmth. Aizawa then pulls out a small notebook and rips a page out of it and puts it over my left hand that has the fire in it as it begins to burn, he then touches the fire which seems to burn him is finger enough for him to let out a small pained noise.

"It still feels like a normal fire. I believe that your body could be automatically reacting to the fire and creates a type of shield around your body using that Cursed Energy of yours. Without that shield it would simply just burn you like a normal fire would." That... does make sense... "Another theory I have about your powers is that the flames could react with what your mind wants them to do. When you killed that Nomu the fire could've easily spread to the building it was near or even to Midoriya since he was so close to it, yet when it died so did the fire. When I just set the paper on fire using your flames there was only a small flame on it, something akin to a flame from a match or a lighter." Seriously? I can choose if my fire kills someone or just burns them a bit?

"Remember that's just a theory, so don't go using your Piercing Flame ability on any humans until we truly figure out how it works, that still leaves the possibility of using your flames and mixing them with your cursed energy though." Aizawa sensei looks over at me with an expectant look as I gulp and look down at my hand. If he's right about the Cursed Energy shield that's protecting me from the heat then if I try to mix it with my Cursed Energy my hands could get seriously messed up! Sure they'd heal, but I've never dealt with burns before!