The Wandering Soul Realm, also known as the Wandering Soul Ghost Realm, was a mysterious small world relatively close to Earth Prison. The people there specialized in the cultivation of the Way of Ghost and were good at keeping ghosts. These ghosts were not ordinary as they were ghost slaves capable of infiltrating people's spirit sea and devouring their souls.
Many people didn't want to deal with people from this small world because they were too scary. You never know when they would release a ghost slave, send it into your spirit sea, eat away your soul, and finally turn you into a fool who has lost all intelligence before killing you. Even a Little Saint might be devoured by ghost slaves and die, let alone Bu Fang who was just a half-step Saint.
