Part Three
When Novu died, he released the cosmic energy within him into the Satellite. This gave the heroes enough power to transport the surviving Earths and their Suns into a dimension between the universes called "the Bleed", preventing Earth-One's annihilation. Eight months later, Hawkgirl and Earth-Two's Superman recover Wonder Woman's body in space, Wonder Woman having survived Earth-46's destruction due to her immortality. While they are safe from the Anti-Monitor, the Bleed has different laws of physics: natural disasters occur daily; and beings from parallel Earths' past, present, and future have begun appearing all at once, straining the heroes' collective resources.
After being exposed to Scarecrow's fear gas while fighting Earth-10's Nazi soldiers, Batman remembers an old man, whom he now realizes was a dying Flash, telling him to go back to before "the beginning". Doctor Fate confirms Batman's theory that the solution to the Crisis lies before the multiverse was created. Stewart tells the others about Constantine, who claimed to be from that time. Batman, Fate, Stewart, and Wonder Woman leave the Satellite to find Constantine. Using Fate's magic to restore Constantine's memories, they discover that Constantine's Earth was ravaged by Darkseid. To restore his Earth, Constantine instructed his Earth's Flash to travel back in time and kill Darkseid when he was vulnerable as an infant.
Earth-10's Lex Luthor arrives on the Satellite, revealing that the Anti-Monitor has found the Bleed and forced its way inside. After it destroys Earth-146 and Earth-2, Question and Earth-1's Lois Lane deduce that Luthor revealed the Bleed's location to the Anti-Monitor in exchange for Earth-10's survival. Luthor and his team of villains have correctly concluded that life in the Bleed is unsustainable, so they captured Psycho-Pirate and tortured him into contacting the Anti-Monitor. Luthor's true goal, however, was to bring the Anti-Monitor to the Bleed so that they could study its weaknesses, kill it, and return to the regular universe safely. After sacrificing Earth-AD (Earth-86) to the Anti-Monitor to see its abilities in action, Luthor suggests that Earth-One's Superman could absorb the solar energy of all the Earths' suns and channel it into a blast strong enough to destroy the Anti-Monitor. Despite knowing that this act would kill him, Superman agrees only for Supergirl to take his place while guilt-ridden over killing Novu. Returning to the universe, they are aided by a new Green Lantern Corps and Martian Manhunter commanding the Warworld, who uses Psycho-Pirate to unite all the universes through hope. This energy blast weakens the Anti-Monitor long enough for Supergirl's sacrifice to obliterate it.
As the heroes and villains gather on Warworld, Batman explains Constantine's role in the Crisis, that Darkseid was a fixed point in the universe, and that the temporal paradox resulting from his death, instead of altering a timeline, shattered the universe into two halves, creating a reality with Darkseid and one without him. The multiverse has been dividing infinitely on similar decision points ever since. Because reality cannot cope with many universes, the Anti-Monitor was created as its immune response, killing off universes to prevent the multiverse's total collapse. A race of Anti-Monitors approaches the Satellite and begins destroying Earth-508, Earth-12, Earth-2003, and Earth-10, forcing everyone to see the futility of their efforts and the need to correct Constantine's mistakes.
Constantine suggests fusing the multiverse into a single "Monoverse" that reality could cope with, and Batgirl suggests using the Miracle Machine of Superman enemy Brainiac, which Supergirl had hidden in a pocket dimension before she died. After Nightshade teleports the Miracle Machine to Warworld, Wonder Woman sacrifices herself to provide immortal energy to recharge the machine and create the Monoverse, where the survivors will merge with their counterparts of that universe once they enter with no memories of their lives before the Crisis. Watched by the Spectre, the assembled heroes and villains walk into the Monoverse, except for Question, who rejects the "false reality" on principle, and Psycho-Pirate, whose mind was damaged in order to power Warworld, who has been left to die. Though Constantine braces himself for the Spectre's punishment for ending the multiverse, the latter offers him "hope" instead of "justice". As the Spectre leaves, Constantine considers following everyone, only to instead decline and accompany the Spectre to an unknown fate as the multiverse is ultimately destroyed.
On Themyscira, a young Diana is shown playing on a clifftop in the newly established Monoverse, where Hippolyta’s warning, that she is not immortal, indicates that she will be spared the tragic, unending lifespan of her Earth-Two predecessor.
