This matter, even if an old Taoist priest were to explain it in detail, no matter how concise his words, it's feared he would still have trouble clarifying it.
Chu Mo himself represents a kind of Dao, the Dao he cultivated in the vast Yanhuang realm from childhood, which is also recognized by this piece of Heaven and Earth as a kind of Dao.
The existence that was left here is actually a kind of Dao from the Luotian Immortal Domain, a simple and supremely simple Dao—that kind of Dao belongs to the Way of the Saint!
Don't look at the old Taoist priest who came from the Luotian Immortal Domain back then, practicing the Dao of the Luotian Immortal Domain. But he still can't use his own Dao to collide with, verify, and integrate with this Saintly Dao. If he tried to do so forcefully, the result would only be one: death and the vanishing of his Dao.