What the Source is
Jack Kirby introduced the Source and the Source Wall in New Gods #5 (November 1971) as part of the Fourth World mythology. The Source is the cosmic energy at the universe’s origin in DC continuity; the Source Wall surrounds it. Cosmic beings who have attempted to breach the Source are imprisoned in the Wall as a permanent monument to cosmic-scale hubris. Subsequent DC cosmology has positioned the Source as the foundational creation point of the DC multiverse.
Collector context
New Gods #5 trades modestly. CGC 9.4 is in the four-figure range.