Orcus

Demon Prince of Undeath, Lord of Blood Orcus. He was one of five demon lords, trying to turn the world into his personal plane. Plots against the goddess known as the Raven Queen

Appearance
His appearance has been twisted and corrupted, said to be humanoid that is vaguely goat-like with bat-wings. He is also rumoured to have a body swollen like a bloated corpse fitting for the domain he rules over.