He-Man in black magic and all forms of combat. He was also shown to be extremely cunning and intelligent. Though his origin was mysterious, and the cartoon described him only as a "demon from another dimension", a tie-in comic implied that Skeletor's true identity was Prince Keldor (the older brother of King Randor), thus making him He-Man's uncle. It was revealed in the animated motion picture "He-Man and She-Ra: The Secret of the Sword" that Skeletor was Hordak's right-hand man until his capture (Hordak referred to Skeletor as "my old pupil" and Skeletor's throne-room in Snake Mountain as "my old throne-room"
The Cartoon History of the Universe enliven his subject. He reports both the greatness of human achievement and acknowledges humanity's savagery. In addition to being a straight (though unusual) history, "The Cartoon History" helps readers understand historical cause and effect—how the past relates to the present. It explains the motivations behind human beings' discoveries, inventions, explorations, wars, triumphs, and mistakes. Gonick's editorial aim seeks to do justice to every point of view. Gonick consistently uses elements of satire to find the most humor in every situation. For example, one cartoon panel depicts the barbarism of a group of Huns who had elephants herded off a cliff