I am... the First Lantern.
After Batman Dragon created the Earth-15 incident, the entire DC Multiverse's Over-Time Stream suffered tremendous damage. All kinds of monsters and strange beings escaped, causing countless different futures to emerge at the end of the Over-Time Stream...
Supreme Superboy and Parallax Hal destroyed all the Sixth Dimension Gods and ruled the Multiverse, attempting to join forces to create a perfect world. However, because the Multiverse was inherently flawed, they were forced to restart the world's future again and again...
Emperor Joker schemed against everything, eventually killing all the Sixth Dimension Gods and becoming the twisted future that ruled the DC Multiverse...
Parallax Hal unleashed his full power, only for Darkseid to reap the benefits. By occupying Prime Universe Hal's body in advance, then using time overwriting to seize Parallax Hal's body, Darkseid devoured Barbatos, obtained the World Forger's Corpse, killed Batman Dragon, and ultimately became the future god of the entire Multiverse...
(Note: Parallax Hal is the Prime Universe Hal after the Infinite Earths Crisis. Therefore, the Prime Universe Hal in Chen Tao's current Over-Time Stream reality and Parallax Hal are the same person, and they have a causal connection.
This was also why Darkseid targeted Prime Universe Hal. He intended to scheme against Parallax Hal. If he succeeded, that future would come to pass, but Darkseid's plan had now been destroyed by Chen Tao.)
Parallax Hal self-destructed and voluntarily sacrificed himself, destroying all the living beings on the Prime Universe timeline. This caused the Black Death Emperor to descend and drag the World Forger completely into death, then carry the entire Multiverse into the future of his domain of death...
And...
And...
And.
The aftershocks of Earth-15's upheaval were so violent that almost every participant with any degree of strength could carve their mark