Refining the Human World for my own use, that was Ye Xuan's true purpose.
The Human World was too fragile and also too trivial, serving no actual use to Ye Xuan. Yet, mysteriously, Ye Xuan had an inkling that refining the Human World would be of great use to him in the future.
As for what the use might be, Ye Xuan could not yet predict, but he felt very strongly that the Human World was of great importance to him. That is also why he needed to keep the Human World under his control.
Hum!
Time seemed to halt, and space to freeze over; the boundless darkness had already fled, leaving only a trace of enlightenment over Ye Xuan's spirit, his lips curving into a strange smile.
"The dark descends!"
Above the vault of heaven, Ye Xuan pointed skyward with a single hand, and a remarkably astonishing event occurred!