Skullmaster (voiced by Tim Curry) - The primary antagonist of the series and the nemesis of the Mighty One. Skullmaster is an ancient warrior/sorcerer whose lust for power has driven him to destroy the Lemurians and the Atlanteans. Afterward, Skullmaster was imprisoned underground, where he took command of the inhabitants there (cf. Paradise Lost). During the second season, Skullmaster is freed to roam theearth itself.