Emperor of Bones

Description
Once a noble's son with a promising future in arcane magic, the self-proclaimed emperor of bones destroyed himself and his followers thanks to a necromantic ritual gone awry. Resurrected and driven by a compulsion to complete the ritual, the emperor continued his dark practices at the shrine that bore his name.

The emperor of bones used a zombie owlbear to defend its shrine.

Undead Nature. The emperor of bones did not require air, food, drink, or sleep.