Grimoire ( item ) Grimoire is a recurring item in the " Final Fantasy " series . Generally , but not always , these are books , tomes of great knowledge or magic . The most prolific use of the term Grimoire comes from the world of Ivalice . First mentioned in " Final Fantasy Tactics Advance " , the Gran Grimoire is a powerful tome of magic . Grimoires may also be purchased in " Final Fantasy XII " , entitling the party to increased benefits of different sorts . Appearances . " Final Fantasy IV " . In the " Advance " version , Grimoires are item used to summon the Lunar version of the summons . These items can be obtained from defeating the respective Lunar summons : " Final Fantasy XI " . The Grimoire is the Scholar ' s guide to magic in " " . Upon attaining the Grimoire , a key item , the player can begin their studies as a Schultz Scholar . The Grimoire is not a weapon as it has been in other games ; it is a copy of an ancient magical tome augmented with various military strategies . The astral properties of the Grimoire allow the possessor to command it to appear and disappear at will . Scholars in Schultz ' s School of Military Theory call upon the pages of the Grimoire to cast magic of both the Dark Arts and the Light Arts . PlayOnline ' s description . With the musings and records of a hundred years of scholars crammed between its covers , the grimoire had exceeded its original definition as a tactician ' s manual , and developed into an encyclopedic source of knowledge . The task of memorizing its contents had become a mammoth task for any aspiring scholar , which defeated the Schultz philosophy of practicality and utility . The person to solve this dilemma was none other than Gunther Schultz II , direct descendant of the famous martial theorist himself . Schultz empowered the grimoire with astral properties , enabling the scholar to command the book to disappear and reappear at will . This allowed proponents of the Schultz school to consult the grimoire at any time , significantly expanding their realm of movement . This flexibility would prove invaluable in the time of the Crystal War . . . An inquiring mind and boundless curiosity — these are the traits one must possess if one wishes to tread the path of the scholar . " Final Fantasy XII " . The Monographs appear in the Bazaar as " Forgotten Grimoires " . Monographs make enemies drop additional loot they wouldn ' t otherwise . In addition there are two loot items called the Grimoire Aidhed and the Grimoire Togail . " Final Fantasy XIV " . Grimoires are weapon for Arcanist class and both of its Soul Crystal jobs , Summoner and Scholar . " Final Fantasy Tactics Advance " . The Grimoire ( also known as the Gran Grimoire ) has changed Marche ' s hometown , St . Ivalice , into a new and fantastical Ivalice created solely out of the children ' s dreams . As the game ' s title implies , much of the storyline centers around the two grimoires held by the protagonist Luso Clemens and a mysterious assassin , Illua . The grimoire Luso used is the Grimoire of the Rift , while it is unknown what Grimoire Illua possesses . Though the term " Grimoire " is sometimes used as a common name for any magickal tome , including those that the Scholar job uses , the pair that Luso and Illua hold share a powerful secret . " Vagrant Story " . Aside from the Gran Grimoire , grimoires are used to learn magic spells , and are found scattered around Leá Monde . Whenever Ashley Riot uses a grimoire , the spell will be committed to his memory , and the grimoire used will disappear . Most Grimoires have French names .