The entire Upper World is constructed upon the two great foundations of Kunlun and the Heavenly River.
The connection between the Upper World and the Lower World is also accomplished through Kunlun and the Heavenly River.
However, even Kunlun and the Heavenly River are Tao traditions created by ancient Immortals, not naturally preexisting entities.
And the celestial laws of the Immortal Court are built upon the Kunlun Dao Tong, established by the Supreme Immortal Ancestor with various rules.
Among them, one of the most important rules is that those with power beyond the fifth transmission cannot descend to the lower realm.
It is precisely because of this rule that many high-ranking beings of the Immortal Court are unable to come to the lower realm at will, and cannot deploy their powers there, allowing generations of strong beings in the lower realm room to grow.
But at this very moment in the Mirror World.
Under the gaze of countless astonished Immortals.