He-Man and the Masters of the Universe powers to defend Eternia from the evil forces of Skeletor. Skeletor's main goal is to conquer the mysterious fortress of Castle Grayskull, from which He-Man draws his powers. If successful, Skeletor would have enough power to rule all of Eternia and possibly the entire universe. The Mattel company released the original He-Man action figure in 1982; the franchise backstory was developed by the Filmation animation studio. On 1 December 1982, Michael Halperin wrote a "series bible". Some time after, both firms pitched the idea to the ABC network, who turned it down. The resulting series, "He-Man and the Masters of
He-Man The series was followed by three more, lasting a total of just over two years and ending in June 2015. By the time the animated series was developed, He-Man's origins had been revised: his true identity was Prince Adam of Eternia, son of King Randor and Queen Marlena (an earthling), who ruled the Kingdom of Eternia on the planet of the same name. The Sorceress of Castle Grayskull endowed Prince Adam with the power to transform into He-Man, which Adam did by raising his Power Sword and proclaiming, "By the power of Grayskull..." Once the transformation was complete, he continued