"Under normal circumstances, the Primordial Heaven Realm undergoes a Nirvana Reincarnation only once every ten million quadrillion quadrillion epochs." Xiao Yu vaguely sensed that the Abyss of Destruction had been accumulating power all along. "Before the Nirvana Reincarnation, once the burden of the endless living beings affects the stability of the Primordial Heaven Realm, the Abyss of Destruction will erupt with the energy it has accumulated over endless years and actively cleanse the Primordial Heaven Realm."
The Abyss of Destruction's cleansing was random and indiscriminate.
When that happened, the innate Primordial Lives of the Primordial Heaven Realm below the Ancestor-level would likely die completely—ninety-nine percent of them. Only the Undying and Imperishable Ancestor Gods of Eternity would be able to survive.
Even if the Source Worlds were sufficiently resilient, more than half of them would probably be destroyed.
This was a form of self-regulation carried out by the Primordial Heaven Realm. It was different from the Nirvana Reincarnation that occurred once every ten million quadrillion quadrillion epochs. During the Nirvana Reincarnation, the entire Primordial Heaven Realm would return to Nothingness, then be born again from Nothingness.
Of course, the Primordial Heaven Realm's self-cleansing would only occur under an extremely heavy burden. So far, the Abyss of Destruction had never carried out a cleansing.
Clearly, this reincarnation era of the Primordial Heaven Realm was still very long.
As the wielder of the Abyss of Destruction, one could also actively carry out the cleansing and prevent this indiscriminate destruction from descending.
Moreover, if the energy accumulated by the Abyss of Destruction erupted all at once, it would also damage the Abyss of Destruction itself. For its wielder, that would be more loss than gain.
Therefore, once the Abyss of Destruction had a wielder, they would also actively cleanse the Primordial Heaven Realm