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Book of the Dead (死者の本) is a racial class advancement item in YGGDRASIL.


In YGGDRASIL, it was possible to change races, but in order to achieve a racial advancement, one must need to fulfill several conditions and this would be irreversible. Thus, acquiring specific items are actually necessary in order to shift from one race to another.[1]

Written in Japanese, there was a chapter from the Book of the Dead concerning the transformation of the dead into souls; specifically, the section about differentiation. The book itself almost seems unreadable by New World inhabitants like Fluder unless they used some sort of item or a translation spell to decipher it.[2]


The Book of the Dead is a fairly ancient volume, which gave off a musty smell. Surprisingly enough, the book itself was very sturdy, with no trace of being worm-eaten.


The Book of the Dead allows the player to advance his or her racial class into an Elder Lich. It also contains lore concerning the transformation of the dead into souls.


  • Momonga had used this item to evolve himself from a Skeleton Mage into an Elder Lich.
  • Despite being able to read the book, Ainz admitted to himself that he does not understand what is written in it. He also thought that his friend Tabula Smaragdina is able to understand and explain the content of the book to Fluder if he was with them in the New World.[3]
  • According to the author Maruyama, when the Book of the Dead is used for a Skeleton Mage to become an Elder Lich, the name of the book also changes its title.[4]


  1. Overlord Volume 04 Chapter 5: The Freezing God
  2. Overlord Volume 10 Chapter 3: Baharuth Empire
  3. Overlord Volume 10 Chapter 3: Baharuth Empire
  4. ARCADIA 2.59: ARCADIA 3390 10-18-2011