"And the entire tribe must migrate away from this chaotic region, leaving the vast world."
Half of the civilizations in the ancient battlefield originated from the mythical world 'nearby,' where they established divine realms, dominating vassal races across all directions with their presence.
However, primordial powerhouses cannot enter the mythical world, and thus, once they choose to leave the ancient battlefield, all civilizations must relocate their tribes.
Of course, these primordial powerhouses could also choose to abandon their tribes, letting the transcendent lives of their races remain in the divine realm of the mythical world, roaming the chaos together.
But in doing so, no one could guarantee what might happen in the future.
Without a primordial powerhouse holding the fort for the different races' civilizations, there might come a day when their tribes are suddenly annihilated by an emerging new civilization.
