Masters of the Universe began in the early 1980s as a Mattel toy line, created to launch a new action-figure brand. It soon expanded into the animated series He-Man and the Masters of the Universe (1983), which introduced Prince Adam, his transformation into He-Man, and the fantasy-sci-fi world of Eternia locked in an endless battle against Skeletor. The success of the original show led to the spin-off She-Ra: Princess of Power, comics, video games, and the 1987 live-action Masters of the Univer