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 New Adventures of He-Man Masters of the Universe continuity, as the whole franchise would be rebooted twelve years later. He-Man, legendary defender of the planet Eternia, has been summoned to the futuristic planet of Primus to defend the planet from the evil Mutants of the neighboring planet of Denebria. But his old adversary Skeletor has followed him and allied himself with the Mutants in his fight to conquer the whole universe. Together with a team of Galactic Guardians, He-Man fights to defend Primus and all its power resources from the continuous attacks by Skeletor and the Mutants. The majority of the cartoon episodes were