Man God cannot be killed for iirc the number is around a hundred years from the current point in the story. From Oldeus I think it was 40 years out.

I’d love to say who he’s working towards killing, since it’s not even a spoiler in the source but episode 12 I didn’t even spoil anything and my comment got deleted. I will say that Man God will go after his family, we saw what he just happened to do to Oldeus in order to accomplish his goals and Orsted, far as even the Man God knows is untouchable so it’d be crazy for him to attempt to kill Orsted as a (admittedly insanely strong) mage.