C1530 Hidden
Since it leads directly to the netherworld, then contact with ghosts is unavoidable.
Li Yun found a way to explain the Ethereal Opening in the memories of the gods.
The natural born Stone Monkey Sun Wukong had learned the Seventy-Two Changes of Disha. The first one was the Ethereal Opening!
"Ethereal Opening, Exorcism, Mount Dan, Forbid Water, Borrowing Wind. . . Recruiting Clouds, Taking Moon