- "We just need to buy more time. We might lose the planet, but we can still save the people."
- —Kara Danvers to Clark Kent[src]
Earth-38 was evacuated after the quantum tower failed to hold off the antimatter wave. In the end, three billion citizens of Earth-38 were successfully evacuated. At least a billion made it to safety due to Oliver Queen's heroic efforts and refusal to abandon the defense of the quantum tower until he was overpowered and beaten to death by shadow demons.
- "Uh, J'onn—uh, I thought Director Danvers was with you?"
"She was—but she went to call the president to coordinate evacuation in case the quantum tower fails."
"She is smart—that is exactly what I was about to suggest, but—has she contemplated the number of ships one would require for such an exodus?"
"Brainy—every alien refugee on this planet came here in a ship. I intend to ask them for their help."
"Do you really think they will—after how the government treated them last year?"
"I have faith that everyone will do the right thing—humans and aliens alike."
"Well, in any event—this should help."
- —Querl Dox and J'onn J'onzz discuss plans to evacuate Earth-38[src]
On December 10, 2019, Harbinger brought select heroes of Earth-1 to Earth-38; the latter of which was being wiped out by a wave of antimatter. A quantum tower which Mar Novu placed on Earth-38 at the dawn of time rose to the planet's surface in National City and helped to disperse the antimatter for a short while. However, Mobius's army of shadow demons were quick to thwart their plans.
In defense of the quantum tower, the heroes of Earth-1 fought the shadow demons from a fortified position while Kara and Clark fought the shadow demons from outside. They manage to hold them off for a short while, but the quantum tower was struck and the skies were red once more. Kara and Clark were able to make the tower operational long enough for the evacuation to take place.
- "The battle is lost! We must retreat and save our resources for battles yet to come. [...] Oliver. It is time."
"Has the planet been evacuated yet!?"
"Then it's not time!"
- —Mar Novu and Oliver Queen argue over whether it's time to withdraw their forces from the fight to evacuate Earth-38's citizens.[src]
The heroes took one final stand on the roof of the tower. However, the Monitor told them the battle was lost and to save their resources for future battles. While the heroes continued to fight, the Monitor sent them to Earth-1 one at a time. When he told Oliver it was time to retreat, Oliver refused to leave until everyone was evacuated. As the Monitor tried to send Oliver back to Earth-1, Oliver fired a specialized arrow that managed to temporarily disable the Monitor's powers. Oliver continued to fight off the shadow demons until he ran out of arrows. As the creatures swarmed around Oliver, he took one final stand; dropping his bow and charged towards the army. As Earth-38 was hit by the antimatter wave, the Monitor brought Oliver back to Earth-1, but the latter had already sustained fatal injuries, and died minutes later.
- "Your universe is no more. Of 7.53 billion, three billion souls made it to Earth-1 on the armada of ships. I calculate one billion souls survived due to his noble sacrifice."
- —Mar Novu to Kara Danvers[src]
In the end, there were an estimated three billion evacuated, with one billion making it to safety due to Oliver staying behind and continuing to fight off the shadow demons to his last breath.
After Oliver's untimely death (as, according to the Monitor, Oliver had been destined to die in the Crisis, but things were happening differently than had been expected), Mar Novu went back in time and retrieved the Book of Destiny—which had been destroyed by the heroes of Earth-1 and Earth-38 when Novu had tested Earth-1 to prepare for the Crisis—and got it back intact. He then consulted the Book to figure out what to do next. Kara hopefully asked the Monitor whether the Book could be used to restore destroyed Earths—like Earth-38. He informed her that attempting to do so would drive the user to insanity. Nonetheless, a short time later, after the Book was reclaimed from Lex Luthor—who stole it and an interdimensional extrapolator; jumping between universes and using the Book to kill every version of Superman he could find across the multiverse—Kara was still determined to try to restore her Earth. She and Kate interrogated Lex over how to use the Book, and he told them—but he also ended up giving Kara the same warning the Monitor had: attempting to utilize the Book to restore a whole universe would drive the user out of their mind. Thus, in the end, Kate refused to allow Kara to try to use the Book to bring Earth-38 back.
Unfortunately, Oliver's sacrifice was in vain as Mobius was ultimately successful in destroying the multiverse; including Earth-1, meaning that the refugees from Earth-38 were still doomed and were killed.
A month later however, Oliver (resurrected as a Spectre) and the Paragons were able to restart the multiverse, and some of the citizens from Earth-38, most notably those from National City, were restored; now residing in Earth-Prime's version of National City.