Source Wall

The Source Wall is a fictional location featured in comic books published by DC Comics. It is part of the greater "Fourth World" mythology as envisioned by writer and artist Jack Kirby. Although Kirby may have laid the groundwork for the Source Wall, it was actually Chris Claremont and Walt Simonson who first defined it in the 1982 intercompany crossover one-shot, Uncanny X-Men and the New Teen Titans.

The Source Wall is an enigmatic structure that exists on the edge of the known multiverse. Also known as the "final barrier", it separates defined reality from the realm of the "Source", which is the repository of energy that is the literal source of all life in existence. It could be interpreted by some that the Source is actually God himself, from which all reality springs.

The Source Wall is impenetrable, even by other Gods. Those who are powerful enough to even approach the Source Wall do not possess the means to pierce the barrier. Those who try inevitably become part of the framework of the Source Wall itself.