kiss the boobs, twice

So he becomes Sosuke Aizen

So they had no choice but to just seal the guy because he can regenerate from any wounds and can recreate magic circuits and magic. That's kind of pointless since he's just going to come back later on. While it's fun if it's the MC of a power fantasy we're talking about, it's kind of boring when it's the villain we're talking about who has plot armor and we already know cannot be beaten but remains to be a looming threat.