Hell has 18 cities with eighteen mansions, each mansion accommodated a judge and each judge dictates a city. The Serene Darkness City, Serene Shadow City, and Serene Soul City were in charge of the Prison Realm affairs; while the cities to the more important realms were placed deeper and further in the heart of Hell.
However, the Book of Life and Death was the same for all realms in the Six Paths World, all datas can be accessed from any halls.
"The Book of Life and Death is kept in the Six Paths Paragon in the Serene Darkness Mansion." Lan Si God lead Zhong Yue and Qiu Jin'er and he said, "Emissaries, please bear with me for some time, I need to contact my connections in the Serene Darkness Mansion to get us into the paragon."
The three of them reached to the front of the Serene Darkness Paragon, the mansion was heavily guarded, armed guardians stood guard and patrolled around the mansion, making it nearly impossible for anyone to sneak in.