The Bonesea is one of the 12 Forbidden Burial Grounds and the most dangerous place in the Heaven Spirit World. It is full of mysteries, a land where countless have fallen, but this didn't deter people from going there. The Bonesea is not the most dangerous among the twelve burial grounds, but it is definitely the cruelest. 
The Bonesea reopened in the current era as many cultivators hunt for treasure. In the forbidden zone of the Bonesea, a mysterious force was upset with Li Qiye trying to obtained the Trident as it belongs to the Sea Demons that it caused many tidal waves. The mysterious force couldn't do anything to reclaim the Trident as the primordial laws that were set since the start of time through the Death Scripture prevented it from taking the Trident back much to its displeasure. Li Qiye, later decided to trade the trident for something even more mysterious.
After defeating the Spirit Abyss, Roaring Conch, Dream Empyrean, and the Ancestral Terra (the latter of which was thought to be impregnable even to immortal emperors), Li Qiye issued a challenge to the Bonesea. However, it didn't respond. Li Qiye, believes that the Bonesea seems to have given up on their initial plans, which necessitates that they have/will find a completely new method (Chapter 1534).