Anvilonian Grimoire
The Anvilonian Grimoire is an artifact of the ages and a treasure to any mage. It supposedly contains every enchantment and mystic prononuncement known in the Multiverse, although its passages are so convoluted that even skimming it can exceed the limits of one's sanity. Despite this, it does not mention the Prophecy of None, One, and Two. Johan is the only mage known to possess a copy of the grimoire.
The coming of Adun Oakenshield is foreseen in this book.