The Source Wall is a fictional structure in the DC Comics Universe. The wall lies on the edge of the known multiverse. Beyond the wall lies what is known as the Source, a cosmic essence or being that is the “source” of all that exists. The wall is theoretically passable. However, all those who have tried have been inevitably trapped in it. Source wall explosion is a multiversal explosion that can destroy infinite dimensions. Infinite strength is required to pull a piece off the source wall.