Demon Prince

This is the D&D and Pathfinder creature, not to be confused with Warhammer's Daemon Prince

Demon Princes are a specific breed of lesser tier evil God in the Dungeons & Dragons and Pathfinder. As their name suggests, they are Demons who have managed to claw their way to a position of particular power and influence amongst their kind. They may even be worshipped by some evil races as patron gods, though usually they are not "full-tier" gods, thusly allowing adventurers to bust into their homes and beat the shit out of them.