That was the True Spirit Earth-Bearing Turtle, who also happened to be the custodian of the Mountain God's prison.
It is said that the Earth-Bearing Turtle possesses the strength to carry the earth and can communicate with the land; as long as it is on the ground, it has infinite power.
However, under normal circumstances, it still prefers to sleep with a mountain on its back.
But the Spirit Realm is not easy, and even the turtle must work.
In order to secure a quota for immigration to the human world, even the True Spirit had to come out and work.
"Audacious Demon Race True Spirit, how dare you imprison our Human Race ancestral spirits! Who gave you the audacity? Do you not fear the Human Race's Daoist Venerable seeking justice?"
The Human Ancestor's aura surged, and, after absorbing the residual forces around Mount Bu Zhou, he temporarily unleashed power comparable to a Daoist Venerable.