it. The Dark Tower Much of the action in the last few books of Stephen King's Dark Tower series takes place in "the keystone world", essentially the Earth Prime concept under a different name, complete with appearances by King himself as a character. The Chronicles of Amber Though not using the term "Earth Prime", Roger Zelazny's The Chronicles of Amber fantasy series features a similar concept. In the Amber stories, Amber is the only true world; all others, including our Earth, are but "shadows" of the tension between it and Chaos. Teenage Mutant Ninja Turtles In the Teenage Mutant Ninja Turtles made-for-TV film, Turtles Forever, Ch'rell (or 2003 series's version of The Shredder), took the technodrome from his 1987 series counterpart and Krang and upgraded it with Utrom technology. He later decided to destroy Turtle-Prime to destroy the multiverse. He was stopped by the three teams of turtles from the Prime, 1987, and 2003 universes. Although the true "Earth Prime" of the movie would be that inhabited by Kevin Eastman and Peter Laird in the closing shot, shown putting the finishing touches on the first issue of the Teenage Mutant Ninja Turtles comic book. In other media DC Entertainment In the DC animated feature Justice League: Crisis on Two Earths, the villainous Owlman's ultimate goal is to locate a universe that he designates as Earth Prime, the so-called "original" universe that all other universes stem from, and destroy it, thus leading to the destruction of all reality as well, due to believing that the existence of a multiverse meant nothing truly matters. Earth Prime is shown to be a desolate barren wasteland of a planet which has been ripped out of orbit, with ruins as far as the eye can see. It is unknown what exactly caused its desolation, though Owlman reasons that mankind was destroyed by itself. In the Arrowverse crossover "Crisis on Infinite Earths: Part Four", after the Anti-Monitor destroyed the original multiverse, The Spectre and the seven Paragons (Supergirl, The Flash, Lex Luthor, Batwoman, Ryan Choi, Sara Lance, and J'onn J'onzz) merged elements from Earth-1 (Arrow, The Flash, Legends of Tomorrow, and Batwoman) with Earth-38 (Supergirl) and the unnamed Black Lightning Earth to create a composite universe known as Earth-Prime that is unknown to those from Earth-Prime, apart of a new multiverse. Only the Paragons themselves, as well as their allies and families, are aware of the