Emperor Jade said, "This matter originated from the conflict between the Daoists and the demons. The Demon Ancestor Luo Hou once opened a realm with demon Dao called Luo Tian Demon Realm.
During the great war among the dragon, phoenix, and qilin tribes, he spent many years in the west, planning to merge the Luo Tian Demon Realm into the ancient Vast Wilderness and thus become its ruler.
But eventually, the Ancestor of Dao slew him in the west and sealed the entrance to the Luo Tian Demon Realm beneath Mount Meru.
Thus, the prophecy of the rise of Buddhism emerged, firstly to compensate for the losses suffered by the west during the Dao-Demon strife and secondly to strengthen and solidify the west, ensuring the Luo Tian Demon Realm remained sealed for a long time."
"So that's how it is," Sun Wukong realized.