Mumm-Ra is the main antagonist of the original series, ThunderCats. In the original show, he demonstrated absolute mastery of magic. He often uses the Mutants of Plun-Darr as pawns in his schemes to defeat the ThunderCats. Their original intention was to steal and utilize the power of the Eye of Thundera (and in one episode, the Star of Thundera as well); however, this swiftly shifts to a series-long determination to destroy the ThunderCats outright, the only threat to his power and ruling Third Earth.