Looking down from high in the sky, they could see the enormous irregular rift in the dark ground of the Demon World. This was the location of the Despair Prison.
The size of this rift was more than five square kilometers, and this was only the opening. It was said that the entire rift valley was in the shape of a trapezoid, and the bottom part was even wider.
The specific origin of this special rift valley that looked like a scar on the ground was no longer determinable. It should have been formed by the geological changes of the Demon World. What was strange was that the dark power in this rift was so rich that a thick mist formed above the rift. The color of the thick mist was even darker than the surrounding Demon World.
It was precisely because of the black mist that no one could see the situation inside the rift valley from above.