Nameless Book of Spells

Nameless Book of Spells is a powerful grimoire from the age of the Eight Greed Kings.

Description
During the era of the Eight Greed Kings, legends has it that the Kings possessed numerous objects of power that allowed them to rule the world. The greatest in their magical arsenal was the Nameless Book of Spells. Worth a country's ransom, this tome is protected by strong magic, preventing anyone from touching it other than its rightful owner.

Abilities
According to Evileye, it is a magic item that holds untold power. Through unknown magic, it is said that all magic of the New World is recorded in the grimoire and possibly even newly created magic spells gets automatically transcribed in its pages. It is unknown what kind of magic it is capable of, but its existence served as an example for the existence of the legendary 10th-tier magic.

Trivia

 * Its probable that this grimoire is either a World Item or something close to a Game Encyclopedia.
 * With Fluder's interpretation of the secret book chronicling countless monsters, it's unknown if this book's real name was called Eryuentiu or named after the Eight Greed Kings' floating castle.