Quote Originally Posted by ReaderAt2046 View Post
Suppose that this started out with the classic Paradise Lost concept of the rebel angels rising up against God and the angels loyal to him... except in this setting, Satan and his rebels won.
4e did something like this. A benevolent god, now only remembered as He Who Was, ruled over the astral dominion of Baathion. He was slain by his most famous servant, the archangel Asmodeus, using a shard from the depths of the Abyss. Between this murder weapon, He Who Was' dying curse, and Asmodeus creating minions by torturing souls, the once idyllic realm soon became the Nine Hells of Baator.