Astabar

Astabar was a wizard who, while messing with magic, managed to lock himself away in the ethereal plane with no way to leave. This caused him to starve in the ethereal plane. Fueled by his hunger and his anger, instead of passing on he became a zombie, trapped and forever hungry.

Kevin, Randy, and Sweet Ass finally put him to rest and turned his estate into their own, since he no longer needed it.