Skeletor is a fictional supervillain and the main antagonist of the Masters of the Universe franchise created by Mattel, serving as the archenemy of his nephew He-Man. He is typically depicted as a blue-skinned humanoid who wears a purple hood over his bare-bone skull. Skeletor is determined to gain the powers of Castle Grayskull and rule the universe; however, the incompetence of his henchmen is always an impediment to achieving his ambitions.