The term 'Superman Foe' refers to two characters from the Superman comic book series: Lex Luthor and Luthur. Lex Luthor is a genius scientist and business magnate who is obsessed with defeating Superman. He is the archenemy of Superman and is often portrayed as a power-hungry megalomaniac. Luthor has been featured in almost every incarnation of the Superman franchise, including films, television series, and video games. Luthor's first appearance was in Action Comics #23 in 1940. Luthur is a criminal mastermind and a former scientist who is also obsessed with defeating Superman. He was introduced in Superman #4 in 1940 and has since become one of Superman's most iconic foes.