C6065 Youfu Palace

Nether Mound Palace was the highest level of control in Mastiff Vine World. The seven prefectures were vast, and there were countless cultivators. However, any of the prefectures would be controlled by the Nether Mound Palace.

There was no other reason, because the seven prefectures didn't have the Great Vehicle, and the Great Vehicle of the Mastiff Vine World was in the Nether Mound Palace