Camazotz

Camazotz was a Demon Lord known as the Death Bat. He ruled a layer of the Abyss known as the House of Bats.

Description
Camazotz resembled a grey-furred humanoid figure with clawed arms and legs and the head and leathery wings of a bat. An embodiment of the night, Camazotz represented darkness, fear, mystery, loss, caverns, and evil creatures of the night. As he abhorred light of any kind, Camazotz's realm was in perpetual darkness, prowled by creatures such as bats who relied on senses other than sight to hunt.

History
Camazotz paid a visit to the material plane during the Age of Demons and began a reign of terror in Azlatlan. After stalking the night for years, he was defeated and sent back to the Abyss by Hunahpu and Xbalanque, although the former was decapitated by the demon lord.

Followers
Camazotz was worshipped by many Underdark-dwelling humanoids who had never seen the light of day, as well as savage nocturnal humanoids and predators. For millennia after his banishment, certain tribes of evil Humans and Goblins still worshipped the Death Bat, although most such tribes were destroyed in a genocide at the hands of Tlacolotl's undead army.