The Underworld had always been as mysterious as Sky City of the God race. The entrance to the Underworld was not as elusive as Sky City, but no one dared to step into it. The biggest passage to the devil realm was located in a valley of the Brilliance Continent. After the war against the devils, the Light God sealed the passage of the Underworld with his godhood. However, no one knew that this seal was actually a one-sided seal. It could only prevent the devils of the underworld from going to the Brilliance Continent, but it could not prevent people from entering the underworld from the Brilliance Continent.
For a long time, the God's Domain had been sending people to strengthen the seal of the entrance to the Underworld and preventing anyone from entering the devil's den.
