Dusk Province Restriction

Something that limits the power of immortals allowed in the Dusk Province. If one beyond the limit appears, they are popped like a soap bubble. Even Dao Immortals are helpless against it. However, the Celestial Emperor can freely speak out against it.

"A pair of enormous, gray eyes had appeared in the sky above without warning. Each eye was thousands of miles wide, like a giant, invisible face had come into being in the sky. Cold and devoid of emotion, they looked down indifferently at the haughty head of House Donglin. They emitted no particular aura or presence, as though they were a mere painting drawn in the clouds. Perhaps no one would’ve noticed their existence, if not for the suddenness of their appearance."(Chapter 137)

Lu Yun talked to it and got it to promise to subdue the evil spirits. The restriction also agreed to talk with him when he became strong enough to enter its tomb.