This ThunderCats t-shirt features a distressed image of the menacing villain Mumm-Ra. The shirt reads Mumma-Ra Lives. Mumm-Ra, a sorcerer and demon-priest, is an ancient native of Third Earth, serving as the undead focus for the Ancient Spirits of Evil. Mumm-Ra usually resides in his Black Pyramid as a withered, corpse-like being; however, he can alter his form by reciting the following incantation: "Ancient spirits of evil, transform this decayed form to Mumm-Ra, the Ever-Living!" This transforms him into a muscular fiend who menaces the ThunderCats in each of their exciting episodes before being driven back into his sarcophagus.