If that's the case, then the Zero Civilization is the one that survived the Abyss invasion the longest.
In other words, the earliest appearance of the Abyss can be traced back to 16,000 years ago.
This predates any recorded history of human civilization.
...
As the Reincarnation Source Material took effect, the environment of the Ecological Ball began to reverse over time.
Weathered rocks started to restore, and dead plants began to resurrect.
The upward-growing plants began to shrink.
Dead Star Realm Merchants began to revive, one, two, three…
Azik watched his tribe being resurrected one by one, tears welling up in his eyes.
The resurrected Star Realm Merchants didn't know what had happened but understood something changed within the tribe.
"Azik…"
The leader of the resurrected Star Realm Merchants looked at Azik, who was quite different from his memory, and showed a puzzled expression.
Azik extended his luminous tentacles and touched antennae with the tribe leader.
