The Yu Prefecture was located in the southwest area of the Tianyuan Region. The entire prefecture was plagued by heavy rains all year round and covered in ancient forests. Hence why it was called the ‘rain’ prefecture.
The Yu Prefecture was one of the weakest among the eight hundred prefectures of the Tianyuan Region. It was said that the prefecture lord had only reached the advanced Divine Dwelling stage, making him very insignificant in the Tianyuan Region.