Skeletor was originally an inhabitant of another dimension, populated with others of his kind. During the great wars, a dimensional hole opened up and Skeletor was thrown from his home dimension to Eternia. Skeletor remained on Eternia, raised an army of powerful minions of his own and took over as ruler of Snake Mountain. Skeletor's main goal is to conquer the mysterious fortress of Castle Grayskull, from which He-Man draws his powers. If he succeeds, Skeletor would be able to conquer not only Eternia, but the whole universe.