The Prophecy of Darkness

The Prophecy of Darkness, aka the Yellow Book, was the fourth book to be found in the second iteration of the box. It is an alternate set of prophecies that predicts the bad ending for FNAF3, and, while also predicting The Challenge, it states that both will choose darkness, and both will rule the world.

Trivia

 * Given that the Prophecy of Darkness references the Prophecy of Light, it was likely written after at least some of the Prophecy of Light had already been written. Though Emanguel could have been one of the later books, with the two prophetic books being compiled at the same time.
 * While the common belief in-universe is that the two prophecies foretell the same event, but disagree on what happens (with one being an inverse version of the other), it is possible that the two prophecies are in fact both true, and both foretell different chosen ones. Scott did say in his interview that the answer to which FNAF3 ending is canon is "complex". Maybe they're both canon in a way.
 * There are a few who actually believe this, like Midna. Then again, Midna claimed to already have the power described in Emanguel 19:89-91, so we're not sure if she counts as a reliable believer.


 * There exists a verse of Neptunia 7:3, which gives the chant to summon the books. However, we're not sure if it's from this book, or the Prophecy of Light.