Superboy-Prime, also known as Superman-Prime or simply Prime, is a DC Comics superhero turned supervillain, and one of several alternate Supermen. The character first appeared in DC Comics Presents #87, and was created by Elliot S! Maggin and Curt Swan. Superboy-Prime is from a parallel Earth called Earth-Prime that had no super-heroes. There, Superman and the other comic superheroes were fictional characters only seen in comic books. The Earth-Prime universe was erased during the Crisis on Infinite Earths, and Superboy-Prime ended up in a "paradise" dimension where during that time, he found himself unable to let go of his former life and his destiny as Earth's greatest hero. Over time, his convictions and morals become twisted and warped, such as believing that Earth-Prime is the only proper Earth and that he, Superboy-Prime, was the only one worthy of the mantle of Superboy. Prime firmly believes that becoming Superman is his calling despite the fact that he has become a psychotic and murderous villain. His overwhelming strength, speed, and ruthlessness make him one of the most dangerous foes in the DC Universe.