In the
DC Multiverse Earth-Prime is the true Earth from which all the other worlds within the Multiverse originate, the "actual" reality where the readers of DC Comics live (and where DC Comics operates as a publisher), and is an Earth where all superheroes are fictional. Earth-Prime does, however, become an alternate reality in its first appearance in
The Flash #179 (May 1968), when the
Flash accidentally travels there from Earth-One by being pushed by a creature called
The Nok. The Flash, stranded, contacts then-DC Comics editor
Julius Schwartz, who helps him construct a
cosmic treadmill to return to Earth-One. Eventually, it was stated that the writers of DC Comics of Earth Prime subconsciously base their stories on the adventures of the heroes on Earth-One and Earth-Two. In
The Flash #228 (July/Aug 1974), Earth-Prime's
Cary Bates travels to Earth-One, where he discovers that the stories he writes are not only based on events on Earth-One, but can actually influence these events as well. This power turns for the worse in
Justice League of America #123 (October 1975), when Bates is accidentally transported to Earth-Two. The interdimensional trip temporarily turns Bates into a supervillain, and he kills the
Justice Society of America. Fellow writer
Elliot S. Maggin, with the help of the Justice League and the
Spectre, restores matters on both Earths in
Justice League of America #124 (November 1975).
Ultraa The first superhero of Earth-Prime is Ultraa, introduced in
Justice League of America #153. Like Superman, Ultraa was the sole survivor of a destroyed alien world, rocketed to Earth-Prime as a baby. After his first encounter with the Justice League, Ultraa decided Earth-Prime was not ready for superheroes and relocated to Earth-One. Post-
Crisis on Infinite Earths in 1985, when there was no longer an Earth-Prime or greater Multiverse, Ultraa was retconned into being from the planet
Almerac, homeworld of
Maxima.
Superboy-Prime The second superhero (later turned super-villain) of this Earth is Superboy-Prime, revealed as the true Superman from which all the other Supermen originate. He first appeared in
DC Comics Presents #87 (Nov. 1985). This Superboy's powers first manifested around the time of the passage of Halley's Comet in 1985. Just after manifesting his powers, Superboy-Prime met Earth-One's Superman. Soon after, Earth-Prime was destroyed in
Crisis on Infinite Earths #10. Superboy-Prime escaped his universe's destruction and later joined Earth-Two's
Superman and
Lois Lane and Earth-Three's
Alexander Luthor in traveling to another dimension. In
Infinite Crisis, a now anti-heroic Superboy-Prime convinced Luthor that Earth-Prime was the ideal world and urged him to draw his inspiration for making a new Earth from Earth-Prime. Luthor began searching through the myriad Earths for Earth-Prime and, in a metatextual nod to Earth Prime's original status as the keystone Earth, looks directly at the readers and reaches out towards them to grab our reality. In 2004, DC revisited the Earth-Prime concept in the
miniseries Superman: Secret Identity. Writer
Kurt Busiek states in the introduction to the collected volume of the series that the original appearance of Superboy-Prime was the inspiration for his graphic novel.
Legion of Super-Heroes The 2008
Final Crisis tie-in series
Legion of Three Worlds makes various references to Earth-Prime during a time that Superboy-Prime is still looking to make his "Perfect Earth". He starts by rebuilding the
Legion of Super-Villains to fight Superman and the three versions of the Legion of Super-Heroes. During the battle,
Element Lad creates
Kryptonite that unexpectedly affected Superboy-Prime; the Kryptonite of New Earth had previously had no effect on
Superman (Kal-L) and or Superboy-Prime during
Infinite Crisis. At the end of the miniseries, it is revealed that
Earth-Prime has been reborn and that Superboy-Prime was returned there. It was also revealed that the Threeboot Legion are from Earth-Prime's future.
The Multiversity: Ultra Comics and Earth-33 In September 2011,
The New 52 rebooted DC's continuity. In this new multiverse, Earth-33 is introduced in
Grant Morrison's
The Multiversity series as the additional designation for Earth-Prime. This Earth continues the tradition of having minimal superhero activity – in this case, the minds of Earth-33's comic book readers have empowered a superhero named Ultraa, who is the only metahuman on Earth-33, fighting the encroachment of the "Gentry" (the series' lead villains) by confining their presence on "our" world to the pages of an 'entrapment comic book' built around the title character. ==Marvel Comics==