[Phantasm]

Originally Posted by Flyndaran

I see Paladins from World Of Warcraft channeling the light.

One somewhat inexplicable character that has yet to be given a backstory in the recent expansion is the one holy dreadlord; a type of "upper middle management" demon. A single golden demon fighting for the light despite no other evidence of that even being possible.

Could this army of light also have such a weird character?

I don't see why not, though I don't doubt he'd either be proof of a redeemed demon (which could send some local religions into a frenzy) and/or distrusted because of his demonic nature.

As for the Investiture, if using Magic-as-Powers it'd probably be more akin to a Pact limitation as or in addition to the Divine power modifier. It'd also probably work best if "all good religions have a grain of truth" is a setting conceit, making most places that aren't demon-infested hellholes normal sanctity for their purposes.