As for why these souls were not taken away by the monks of the underworld, but remained here, there is only one explanation, that is, the forbidden law here can isolate the investigation of the monks of the underworld. He won't be detained by the monks of the underworld.

"Forbidden land of gods and ghosts, I haven't set foot here for a long time..."

The voice of Dragon Devouring Pill Emperor sounded from Ning Qi's mind.