DC Cosmology/The Source Wall

The Source Wall was the boundary that surrounded the DC multiverse and walled it off from the rest of the Omniverse

History
Long ago, the Hands of the Source sent the tremendous energy, in the form of a Cosmic Raptor, needed to seal away their treacherous member Perpetua, and the totality of her power, was caged inside what would come be known as as the Totality and sealed within the Source Wall.

The Totality
The Totality was believed to be theoldest known energy source in the DC Multiverse and the power core from which the Multiverse was created. During the invasion of the Dark Multiverse, the Justice League used Element X in order to defeat Barbatos and raise Prime Earth back to its original position. However, the cost of doing this broke the Source Wall, releasing the Totality and sent it hurtling through spacetime toward the Earth.Once freed from the Source Wall fragments of the Totality were scattered throughout the past, present, and future as it careened through space and time.

A large fragment landed on Earth in the 47th century BCE and the radiation created the first Metahumans. William Payton was hit by a small piece of the Totality when the Stellaron-5 satellite attempted to capture a fragment of in 1943, granting him a connection to the Totality and solar based abilities.

Much later, Brainiac was able to redirect Will Payton's power to the Totality, restoring the physical form of Perpetua.