Xuthl

Xuthl is a demon lord known as the Lord of the Evil Dead, who manifests as a pillar of flame with a perpetually amused face within. Master of the shedu, a race of demonic entities that can possess the living, Xuthl was frequently dealt with by sorcerors during the Hyborian Age, including Thulsa-Doom and the Devourer.

Comments

Some suspect that its honorific title and possessing demons are an homage to the Evil Dead films.