Why is the Profound Immortal Cave Heaven so terrifying, its mass so heavy?
It's because the Profound Immortals have mastered the creation laws, capable of producing indestructible substance.
These indestructible substances can merge into the cave heaven world, increasing the world's mass.
Thus, the mass of the cave heaven world of a Profound Immortal becomes incredibly terrifying.
In comparison, the cave heaven world of a Heavenly Immortal is like comparing an ant to an elephant.
How can a Heavenly Immortal's cave heaven world compare to that of a Profound Immortal?
As for Zhen Suyan, as a True Disciple of the Feather Gate, she is an extraordinary Profound Immortal, with a cave heaven world within her body refined for countless millennia, infused with indestructible substance.
This also makes the mass of her internal cave heaven world unimaginably massive.
She doesn't even need to utilize any Immortal Techniques.
