Black Cover Book

Non-Canon: REMINDER! This page is considered as among one of the many pure game contents found exclusive in Mass for the Dead only. It includes the new standalone characters that had a first-time appearance in the game. Meanwhile, the old characters had a different role and fate than from the main storyline in the official books. For that reason, it has no connections to the canon story materials of Overlord Light Novel series. The content that you had read here are based on the Overlord mobile game.

Black Cover Book
Item Information
Type	Book
Origin	YGGDRASIL
Users	Billiophia
Debut Information
Game	Mass for the Dead

Black Cover Book (黒い表紙の本) is an item from Mass for the Dead.

Description

The book's contents was written by a players from YGGDRASIL who happened to be an admirers of the guild of Ainz Ooal Gown. Some after the Mercenary Knights, which were unrealized contents made by these players, manifested in the Sea of Possibilities, the book was kept by its intelligence officer, Billiophia. She and her fellow sisters heeded the book in sacred light as it was a connection to their creators and was the only medium that they had knowledge of them. In addition the Mercenary Knight took the writings of the book as doctrine, inheriting their creators admiration for Ainz Ooal Gown.

From the book, the Mercenary Knights knew of the world of YGGDRASIL and the Great Tomb of Nazarick. Although they believed the words to be true, they lacked physical proof of the existence of Ainz Ooal Gown. However while they were traveling the various worlds, they came across the protagonist and a band within the Crack who matched the descriptions of beings from Nazarick. They suspected that there was a connection and it prompted a meeting between the Mercenary Knights and the Sorcerer Kingdom.

While the Sorcerer Kingdom was initially wary at the Mercenary Knight due to being creatures of the Sea of Possibilities, passages from the book gleamed interest from the Floor Guardians and the Sorcerer Kingdom as they proved that both parties shared a common origin.

Appearance

The item is a black covered book as named. It resembles a YGGDRASIL Game Encyclopedia.

Abilities

The book contains information on the guild of Ainz Ooal Gown and how much the author admired its members. It seems more like a diary or message notebook left by the creators. In addition it contained designs and notes on the the members of the Mercenary Knights. And also equipment that was designed to be suited for them.

Entries

• "Chapter 6. Ah, the ones who fight back against the righteous hunters of other races, right? Apparently there are even World Champions and World Disasters among their guild members. I admire them, I really respect them."
• "Chapter 7. I think the guild name is Ainz Ooal Gown. The guild master is an animal-like person...yes, Momonga-san. He must be amazing. I'd like to meet him someday."
• "Chapter 80, Section 72. The PK guy who was targeting the monsters was killed in an unknown manner. It doesn't look like he was killed by soil erosion, so it's impossible to pinpoint his location."
• "Chapter 170, Section 5. There is an incredible guild that managed to defeat a punitive force of 1,500 people. It is a guild made up of only heteromorphic races like us."
• "Chapter 174, Section 2. This is the first time I've heard of World Items."
• "Section 4. According to the strategy information on the message board, it's one of about 200 Balance Breakers in the world."
• "Section 7. If a World Item is used, you can't defend against it unless you have a world-class item. Isn't that a bit of a cheat?"
• "Section 10. Rumor has it that Ainz Ooal Gown has collected quite a few. They've become the guild's shared property."
• "Section 11. It's a height that weekend gamers like us could never reach. It's really amazing."

Trivia

• Billiophia always keeps this book in her left hand, reading and quoting passages.
• On occasion Ella would use some of the designs to get inspiration to make them into reality by using Remnant.
• When making a solemn promise to Momonga to keep the fact that the Sorcerer Kingdom has possession of a Ghost Ship, Billiophia swore on the Black Cover Book of her creator.