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/ThunderCats friends and He-Man and Lion-O rush into the Castle. He-Man guides Lion-O through the maze of Castle Grayskull saying it is a nexus of worlds and reality through space and time and they must find the Sorceress before it's too late. They arrive at a shattered door that shocks He-Man as he says no intruder has ever gotten so far into the Castle. Both heroes charge forward and find the newly formed Mummator imprisoning the Sorceress and holding an orb that is the heart of the Castle, the key to all the power that Greyskull possess. Mummator says that he