C1565 A Divine Beast of the Edicts

The black cloud in the sky above Ju Cheng did not dissipate due to the departure of Ming Ye and Zu Xiu. Instead, it began to condense at an unhurried pace.

It was clear that the black cloud wasn't gathered to be controlled by Illusory Sky, but was condensed because it met certain conditions. Once it appeared, it would be difficult to make it disappear without meeting some conditions