Multiverse (New 52) - Earths:

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Known also Earth-Prime, this mysterious world without superheroes exerts a powerful and unknown influence on the progress and development of the entire Multiverse. Monitor conjecture suggests that ideas created by ordinary human minds on Earth-Prime become realities on other worlds of the Multiversal Orrery structure. Earth Prime's only known superhuman inhabitant is known as Ultra Comics.

The Multiversity: Guidebook (2015)