What is the famine online version of the black book? What is it made of to cut things in half?

Famine Online Black Book is a book that summons shadow servants.

There are many kinds of famine books, but only two people have them (not counting other MODs). One is grandma, whose books are amazing.

And a Maxwell's magic book. The book is purple-black, with the capital M, which can summon shadow servants to help players do things or play tricks. However, you will be punished by mental limit and blood volume, and you can summon up to 4 shadow servants.