One of its most important uses is that it contains a chant that is needed to "summon" the demon Agrith-Naar (but actually returns him to his realm) during the quest. The chant differs from player to player, but the words used are: Tarren, Caldar, Camerinthum, Agrith-Naar, and Nahudu. The same chant spoken backwards truly summons the demon at the end of the quest. After the quest, this book can be found on the shelves in Player-owned houses.