Book of Prophecies
The Book of Prophecies (予知書, Yochi sho?) is a book that appears in Kingdom Hearts χ and Kingdom Hearts Unchained χ. It is the source of cards and medals, which allow the Player to harness powers from the future.
Kingdom Hearts χ
According to the Player's Chirithy, his creator, the "Master of Masters," gifted five of his six apprentices with a tome from the Book of Prophecies before disappearing. These five disciples, who would become the Foretellers, discovered a shocking passage on the tome's last page:
Kingdom Hearts Re:coded
Following their defeat in the Datascape, Maleficent and Pete discuss the ancient Book of Prophecies. According to legend, it is capable of transcribing and conjuring future events, as well as creating entire worlds filled with beings and powers that have yet to exist. Maleficent decides to search for a connection between the Book of Prophecies and the Datascape, and she wonders if the book is also connected to Jiminy's Journal.