Dark Prognisticus

The Dark Prognistcus is a mysterious book of prophecies that details how to summon the Chaos Heat and use The Void to destroy all worlds. The Tribe of Darkness guarded it to prevent it from being used, but a scion of the group stole it and killed them all so he could destroy everything.

Following Dimentio's defeat, the book disappeared, and even Dogbert, Dimentio, and the highest levels of Interdimensional Black Ops are unaware as to its location.

Trivia

 * It is heavily implied Dimentio either wrote the book or had a connection to it.