"A genuine Demon Book!"
Every demon with even the slightest understanding revealed an uncontrollable desire of greed.
The Demon Book awarded to Pope could only be fully mastered by beings of middle rank or higher… even an entity like the [Toad Ancestor] possessed only a single complete Demon Book.
The essence of a Demon Book corresponds to the lifetime knowledge of a certain Old King, while also containing the Truth of Demons. Its origins and creation are mysteries known only to Old Kings of the highest order.
It can be said that the Demon Book is the supreme treasure unique to [S-01]. Borrowing the quality classification used by the Black Tower, every Demon Book would be ranked at the highest grade: "Imperial."
Even the first section of the [Revelation of Glaki] alone is equivalent to a piece of Legendary Equipment.
A Demon Book can be used not only for study and comprehension but also as an item of equipment.
