The Servant of God separated the pages of the Underworld Abyss and used the "Underworld Abyss" chapter as a tutorial level for travelers.
With the protection of the "Book of Knowledge Illusion," the souls of the demon clan's monsters could be reborn and revived even if they died in battle, without truly dying.
Since they couldn't truly die and couldn't yield any profit, using them as a tutorial level was quite appropriate.
The Knowledge god servant even shared the full access to the "Book of Knowledge Illusion" with Lin Xun, letting him take charge in designing the tutorial level.
Lin Xun thought to himself that although the future 'travelers' were likely to be seasoned Apostles dug up from the Book of Salvation, using the hellishly difficult seventh chapter as their tutorial was still a bit too abnormal.
After all, not everyone had abnormal strength like himself.