I imagine it must have been a very powerful demon to be worthy of ascension and to prove threat to an entire country.

( His own world is filled with demons especially in Hell, of course, but most of them are lesser, and they do threaten mortals if they escape through the gate. ...what even is that name? Wrath's face at the moment would be amusing if anyone could see it, but they cannot. )

Is that why you're down to so few believers then?