From the records of the first generation who entered the barrier of the Celestial Star Cave, it's understood that from our perspective, it happened ten thousand years ago. This world was initially an era of cultivation, vast and grand, but then the world underwent significant changes, ushering in the End of the Dharma Era, with spiritual energy dissipating wildly, and the cultivation realm sensed a catastrophe approaching.
The specifics of how that catastrophe came about are unknown, as the Celestial Star Cave was merely a third-rate sect in that era, and had no qualification to know, with no records available. They only know that after the spiritual energy began to dissipate, chaos erupted in the cultivation realm, but the true calamity looming over the cultivation realm was the message sent to the cultivation realm by the three major ancestral veins of the human world.
