He-Man and the Masters of the Universe plot
Prince Adam is the son of the rulers of Eternia, King Randor and Queen Marlena. If he holds up his Sword of Power and the magic words "By the Power of Grayskull, I HAVE THE POWER!" says, he becomes He-Man, the most powerful man in the universe. Along with his allies Battle Cat, The Sorceress, Teela, Man-At-Arms and Orko, He-Man uses his powers to defend Eternia from the evil Skeletor. Skeletor's main objective is to conquer the mysterious Castle Grayskull, where He-Man draws his power. If Skeletor succeeds, he would dominate Eternia, and possibly the entire universe.