It can be said that the Dream Soul Gu is an extremely special Heavenly Earth Gu Worm. It doesn't need to ascend to the Immortal World to enhance its cultivation, as long as it has enough soul energy.
Although the soul energy of mortals indeed cannot compare to that of immortals, the problem is that there are enough mortals.
And every few hundred years, a batch can be harvested.
Coupled with the boundless void of the mortal realm, it's unknown how many worlds are nurtured.
If one can control the Dream Realm of these worlds, perhaps even cultivating in the mortal realm, the Dream Soul Gu can reach the realm of a Daluo Golden Immortal, or even higher.
"That being said, we still need to invade other Great Thousand Worlds."
"For example, the Prison Demon World, the Earth Immortal Realm, and the Magic Treasure Great World."
