Prolly something like that - like a sanity meter or smth.
I feel like 100% eroded will make him some kind of ridiculously OP race while keeping his personality
That's what I'm going to assume. Like, if he(or they) keep obeying the voices it's going to warp their personalities and possibly give birth to a demon king (JK but possible?). Just like that POS classmate of his. I feel like every time we see him, his personality iss gonna get worse and probably just end up destroying himself.
Lol you might've just predicted the final battle. MC vs eighth grade syndrome jackass.
erosion rate? looked like a spider's web though. is he turning into a monster or something?