In the past, before the Primordial World was reshaped, when the All Heavens and Myriads of Worlds still existed.
Jiang Chen and the others accidentally discovered, in the most remote areas of the All Heavens and Myriads of Worlds, that certain worlds were being drawn away by an unknown force, gradually distancing themselves from the Primordial World, until they completely vanished.
This matter coincided with the news of Di Jun's appearance.
At that time, due to the impending change in heaven, everyone's attention was mainly focused on the Primordial World, so they didn't pay much heed to this matter.
They merely speculated that those worlds, drifting away from the Primordial World, were likely being devoured by Chaos Demigods to restore their own power.
