When the Eighteen Layers of Hell is mentioned, common people's first impression is that it is the place where the wicked souls are punished.
However, Jiang Chen, coming from the royal family, knows much more about Hell than the ordinary man.
Therefore, he knows that those who are suppressed in the Eighteen Layers of Hell are not just the utterly sinful ones. At the deepest part of these layers, many powerful beings from the ancient times and the age-old eras are confined.
These beings have reached an inconceivable level of cultivation and are extremely difficult to kill. Consequently, some Great Divine Transcendents in the world imprisoned these powerful beings in the depths of Hell, planning to slowly eradicate them over endless years.
But now, judging by the current situation in the human world, something must have gone wrong with the Eighteen Layers of Hell. That explains why no experts from the Three Realms have come here.