The Exorcist - Jujutsu Kaisen

"I remember being told something like this happened to Satoru. Once on death's door, he awoke. In the heat of battle, he became something bigger than Satoru Gojo. Learning how to use reversed cursed energy seconds away from the end, and in hand learning to mix Cursed Technique - Lapse Blue and Cursed Technique - Reversal Red to create Hollow Purple.

My friend died that day. His death set into motion so much more than I'd ever imagined. Satoru Gojo died so that Gojo Satoru could thrive.

Why did he have to die to evolve into the person he'd become? We could have helped him, the six of us together. Funny how there once was a time when I didn't want to do anything more than yell at him.

I think we'd all still be together if Gojo never came to be. I think I'd be a better person too. Now I live in a world where I wish Satoru would have died because I'd rather have him looking over my shoulder than a god.

I know today is not my day to die, but something inside me is changing. My soul is slipping, reshaping into something. Something much worse."

TLDR: JJK with a main character who goes through a darker, more unseen version of Jujuitsu Society.
Crossposted on A03 under the same name