He-Man sharing it only with Orko, Man-At-Arms, Cringer/Battle Cat and the Sorceress. The spin-off cartoon series "" later revealed that Adam had a twin sister: Princess Adora, a leader of the Great Rebellion against Hordak on the planet Etheria. Adora, like Adam, was given the gift of the power of Grayskull and had her own sword which she used to transform into She-Ra, Princess of Power. He-Man made a number of appearances in the "She-Ra: Princess of Power" television series. He-Man's archenemy was Skeletor, a blue-skinned sorcerer with a yellow skull for a head (concealed with a cowl). He was skilled
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