Superboy Earth-Prime
Superman-Prime
Adopted Name
Clark Kent
Note: The Prime Universe was one of many alternate realities that existed before the Crisis on Infinite Earths.
Invulnerability is derived from a biological aura, which can be extended to other objects and beings within close proximity.
Note: Superman-Prime apparently can only be weakened by red solar radiation. He has shown no weakness to Kryptonite radiation or magic.
Green Lantern Vol. 3
Infinite Crisis
Growing up apparently human with no knowledge of his alien heritage, it was not until the passing of Halley's Comet that the teenaged Kent's powers were activated giving him the power of Superboy.
During the Crisis on Infinite Earths, Earth-Prime and its universe was destroyed by the Anti-Monitor. The sole survivor of Earth-Prime, Superboy joined the heroes of Earth-1 and Earth-2 to battle against the Anti-Monitor. In the conclusion of the crisis many of the realities of the Multiverse merged into one universe, Superboy went into exile along with the Superman and Lois Lane of Earth-2 and the Lex Luthor of Earth-3.
During his time in exile, Superboy grew bitter; encouraged by the machinations of Earth-3's Lex Luthor. Luthor's plan was to recreate a new Multiverse and once again create a home for himself and his allies. When the heroes of Earth attempted to stop Superboy he became homicidal, and his rampage was only halted with the intervention of the Green Lantern Corps.
Liberated by the Sinestro Corps from his incarceration under the authority of Guardians of the Universe, Superboy was equipped with armor which fed his body yellow solar radiation giving him even more powers as Superman-Prime.