Big Bang (original multiverse)

"In the beginning, there was only one. A single black infinitude. Then the infinitude found release, and, finally, the darkness broke, filling it with life. With the multiverse. Every existence multiplied by possibility. And spread out before space and time in infinite measure. Civilizations rose and fell. And rose again across reality's grasping expanse. Life. A precious gift persevering in the face of every obstacle, until, finally, the age of heroes was born. Chaos. The constant enemy of life kept at bay by champions from across the multiverse...joining forces to fight on behalf of all creation. They found each other just in time, because now, the entire multiverse is about to come under attack. There is a malevolent force at work, one driven by a singular goal. The destruction of all there is. I have planned, there are those who say I have schemed, but the time for preparation has passed. The Crisis is now upon us all."

- Mar Novu

The Big Bang is a cosmological event that marked the creation of the original multiverse.

Season 5

 * "Crisis on Infinite Earths: Part One"