Mumm-Rah, sorcerer and demon-priest, ancient native of Third Earth, serving as the undead focus for the Ancient Spirits of Evil.

I reside in my Black Pyramid as a withered, corpse-like being; however, I can alter my form by reciting the following incantation: "Ancient spirits of evil, transform this decayed form to MummRah, the Ever-Living!" This transforms me into a muscular fiend.