Grimoires are texts filled with unholy and otherworldly knowledge. While most grimoires have a soul of their own, given enough time or exposure to power, they can gain the ability to manifest themselves in the human form.
Book of Eibon[]
The Book of Eibon, also known as the Liber Ivonis, appears as an incomplete English translation under the ownership of Vespasianus. As it is incomplete, the Deus Machina of the grimoire, Cykronash, cannot be easily controlled. Detailed within the grimoire is a method of creating an “ultimate being” that would allow one to enter into the realm of gods.
The Golden Bough[]
The Golden Bough is a grimoire with a faint golden glow to it that was owned by Augustus and has access to the Deus Machina Legacy of Gold. The grimoire's abilities are largely gold themed with spells such as Luminus, a projectile-based spell that fires golden beams, and Aport, a spell that creates a golden cage around the target.
De Vermis Mysteriis[]
The De Vermis Mysteriis is the maggot-infested grimoire owned by Tiberius and has access to the Deus Machina Belzebuth. The grimoire is largely centered around necromancy and grants the user immortality and spells such as raising the dead and the Vengeful Spirit Bomb.
Celaeno Fragments[]
Two versions of the Celaeno Fragments are featured within the series: the original penned by Laban Shrewsbury and the copy written by Claudius. The original Celaeno Fragments has access to the Deus Machina Ambrose while Claudius's copy only has access to the inferior Lord Byakhee. Both versions grant the user access to magic pertaining to the demon-god of wind Hastur.
Cthaat Aquadingen[]
The Cthaat Aquadingen, owned by Caligula, is notably similar to the R'lyeh Text in its relationship to water and has access to the Deus Machina Kraken. This grimoire utilizes spells that materialize and weaponize water.
Prayer Book of Blood[]
A grimoire initially owned by Wahav, it has a crimson leather cover and can grant the user a scarlet red Magius Style. The grimoire can be used by stabbing one's own hand with a dagger and utilizing the blood from the wound as a source of energy to use spells such as creating explosive stones. In addition to this, the Prayer Book of Blood's most distinct aspect is that it has the ability to summon the Outer God Zs-a Wia.
Other Grimoires[]
Throughout the course of the story, many other grimoires are mentioned.
- The Book of Loagaeth
- The Key of Solomon
- The Lemegeton
- The Grand Grimoire
- The Black Pullet
- The Book of Dyzan
- Eltdown Shards
- Ponape Scripture
- Sussex Fragments
- Revelations of Glaaki
- The Seven Cryptical Books of Hsan
- Unter Zee Kulten
- Song of Yste
- Gharne Fragments
- Liber Damnatus Damnationum
- The King in Yellow
- Dhole Chants
- Voynich Manuscript