Mumm-Ra is a fictional character from the animated television series ThunderCats, which first aired in the 1980s. He is depicted as an ancient sorcerer and the main antagonist of the series. Mumm-Ra is known for his ability to transform into a more powerful form by invoking dark magic, and he seeks to conquer the world of Third Earth. His appearance is characterized by a mummified body, a flowing red cloak, and glowing eyes. Mumm-Ra resides in a pyramid-like structure called the Pyramid of Darkness, where he plots against the ThunderCats, a group of heroic feline warriors. His character embodies themes of evil and the struggle between good and evil.