Underking

Lived in a Time before Time, he became the first king of humanity. He was the prophet of Ylath for a time and is presumed to have been either a strong fighting man or a devout stormpriest. But For Some Reason, that has been lost over the course of time (or purposely supressed), he fell from grace and was cast into the Underworld and subsequently became a demon. Said to be embittered against the gods and the power structure they stand for, he is often revered by Heretics and revolutionaries.

It is said he is one of the few demons willing to listen to the pleas of mortals. If ever summoned by any type of Cleric, he will viciously attack though. He is also simple to summon, though that knowledge is a supressed taboo.