Du Ye Messenger was a thoughtful Heavenly Immortal, who had visited the Observer's world back when the Immortal Ascension Ladder still existed.
There, he learned of a peculiar phenomenon discovered by the cultivators of the Observer's civilization - a mysterious tiny black speck that seemed to appear and vanish inexplicably.
Initially, Du Ye Messenger dismissed it as a quirk noticed by the unsophisticated beings of the Lower Realm who found everything extraordinary.
But, after scrutinizing it, he became concerned that he, too, was unable to comprehend its nature.
This was odd. His Bai Ze bloodline and his Heavenly Immortal cultivation meant he was well-versed in a myriad of phenomena. Why then could he not understand this tiny black speck?
Du Ye Messenger researched for a while, but failing to come to a conclusion, he returned to the Immortal Realm, letting the matter slide.