This Dark Blue Tome with an Adamantine symbol of Mystril.

Believed to be the Spellbook used by Azuth during his attempt to bind a piece of Savras's divinity to himself. It is believed that this tome was influenced by the energies of those events and may even contain a portion of Azuth's mortal essence.

This book contains the notes and magical works of Azuth and its following Owners While Attuned to this Tome If you spend 48 hours over a period of 6 days or fewer studying the book's contents and practicing its guidelines, your Spell casting Ability increases by 2, as does your maximum for that Ability.  Your Spell Save DC increases by 1/2 your profiency level rounded down and while attuned to this tome you have access to unique ritual knowledge that Mystril provided to its owner. when you cast a spell as a ritual you replace the 10 minute ritual with 1 action of prepatory concentration. Also you may place a Spell Scroll in the Tome of Azuth, after a number of days equal to the spell's level your spell scroll will be absorbed by the tome and will scribe the spell in your spell style allowing you to use it as if you scribed the spell yourself you can only process one scroll at a time in this way. Additionally you can spend one hour in communion with the Tome of Azuth if it is in direct contact with another Spell book during this time it can create a perfect copy of the spellbook's contents on its Template pages. these pages can be used to scribe the spell into the Tome of Azuth in the normal manner as if the template pages are the other spellbook.  Any spells you already know charge the Tome of Azuth with a knowledge point for every level of the spell. You can use knowledge points equal to a spell's level to reduce the scribe time and cost to 1 hour and 25 GP per level. if you choose to use this feature you must apply knowledge points equal to the level of the spell being scribed.

Notes: Wizard or Pact of the Tome Warlock