C313 Pikachu's trace

Outside the law, in Black Demon City, there were many black and terrifying skulls hanging from various houses. They looked very much like human heads.

Black Demon City was like the City of Assassins outside the law. It also had its own teleportation array.

Therefore, Black Demon City was the same as the City of Assassins. It had become the gathering place for the cultivators outside the law