Wait, this general guy is an illusionist and manipulator who, though he says he wanted to watch humans kill themselves, seemed more incapable of killing his foes himself and needed another person’s resources to do so. Doesn’t that mean he’s more of a background person rather than a frontline obstacle? Shouldn’t he be beaten pretty easily?
Ah, who am I kidding? This is a manga - logic like being good at one thing, meaning you shouldn’t be nearly as competent in another and need to compensate for that limitation, is an impossibility