A powerful tome often described as having its own malevolent will. Though its exact origins are unknown, we do have some details. It was described as an obscure Falatacot text by the Gelidites, along with another text called the Uotecatl Ceqt of Nahouhnztl. Rytheran wrote that the book was, "derived from the primal darkness that the Falatacot found so enthralling, the darkness which eventually overcame them," and that when he had used the book, he had, "grasped the power that [the Old Ones] offered through the Book," showing that the root of the book's power comes from the Old Ones. Historically, the book is first mentioned at the end of the Millennium War. In the moments before his death, Sarvien, the last king of Dericost, uttered a prophecy from the Book of Eibhil, known as the Fivefol