A student of geometry once asked us why the 49th spirit of the Ars Goetia is associated with the sound of rushing waters. The answer lies not in the noise itself, but in what the water carries: hidden knowledge, measurement, and the flow of logic. Crocell (also spelled Crokel or Procel) is a Goetic duke who appears as an angel and commands 48 legions. He teaches geometry and the seven liberal sciences, and can produce the sound of great waters or freeze them at will. Among the 72 spirits of the Goetia, his combination of intellectual discipline and water symbolism sets him apart from martial, deceptive, or purely emotional demons.
Meta: Compare Crocell, the Goetic duke of geometry and waters, with other demons like Buer, Vassago, and Agares. Discover his unique powers, rank, and role in the hierarchy.
What the Grimoires Actually Say About Crocell
The earliest known listing of this spirit appears in Johann Weyer’s Pseudomonarchia Daemonum (1583), where he is called Procel. Weyer drew from earlier Solomonic manuscripts, many of which circulated in medieval Europe. In the Ars Goetia, the first book of The Lesser Key of Solomon (compiled in the 17th century), his name is given as Crocell. He is a duke under the rule of King Bael.
The grimoires describe him as appearing in the form of an angel, beautiful and serene. He teaches geometry, rhetoric, logic, arithmetic, music, astronomy, and grammar – the seven liberal sciences that formed the foundation of medieval education. He can also produce the sound of rushing waters and freeze water at will. His command of 48 legions places him among the higher-ranking dukes. For context, the average duke in the Goetia commands between 20 and 40 legions.
Where the Water and the Geometry Meet
Water in the Goetia often represents emotion, intuition, and the subconscious. Crocell’s power over water – both the sound and the freezing – suggests mastery over the fluid boundaries of knowledge. Geometry is the science of measurement and form. Crocell teaches how to measure the world, how to structure thought, and how to move from chaos to order.
The sound of waters is not a random detail. In esoteric traditions, rushing water is often a metaphor for the voice of hidden wisdom. The Zohar speaks of the “waters of knowledge.” Crocell’s ability to freeze water implies control over that flow: the ability to stop time, to crystallize a concept, to hold a single idea still for examination.
His association with the seven liberal sciences is equally deliberate. These sciences were the curriculum of the medieval university, divided into the trivium (grammar, rhetoric, logic) and the quadrivium (arithmetic, geometry, music, astronomy). Crocell covers both. He is a spirit of structured learning, not raw inspiration.
How We Work With Crocell
When we invoke Crocell, we draw his seal on virgin parchment using a quill and ink made from rainwater. The seal itself is a complex geometric sigil, composed of intersecting lines and curves, often inscribed within a circle. It can be found in the Ars Goetia and in most modern editions of the Lesser Key.
We perform the invocation within a consecrated circle, typically on a Tuesday or Thursday during the hour of Mercury. The focus is always intellectual inquiry. We do not ask for wealth or love. We ask for clarity on a mathematical problem, for insight into a logical argument, or for the structure of a difficult text.
Offerings might include a compass and straightedge placed on the altar, a bowl of water from a natural spring, or a written question left under the seal. Crocell is considered cooperative but demands respect. He will not answer a frivolous request. His temperament is calm and instructive, unlike the volatile nature of spirits such as Focalor or Agares.
Crocell Compared to Other Goetic Demons
The Goetic hierarchy contains 72 spirits, each with a distinct domain. Crocell’s closest counterparts are other dukes who teach sciences, and other water-associated spirits. Here is how he measures up.
Buer (10th spirit, president, 50 legions) teaches philosophy, logic, and herbalism. Buer is associated with the earth element and with healing. Crocell is water and abstract knowledge. Buer gives practical medicine; Crocell gives theoretical structure. Both are patient teachers, but Buer’s domain is the body, while Crocell’s is the mind.
Vassago (3rd spirit, prince, 26 legions) declares past and future and finds hidden things. Vassago is a revealer of secrets, but his method is divinatory, not systematic. Crocell teaches you how to discover knowledge yourself. Vassago hands you the answer; Crocell hands you the tools.
Agares (2nd spirit, duke, 31 legions) causes earthquakes, teaches languages, and makes people run. Agares is martial and chaotic. He can teach, but his primary function is disruption. Crocell is the opposite: he brings order, not earthquakes.
Vapula (60th spirit, duke, 36 legions) teaches handicrafts, philosophy, and sciences. Vapula is the spirit of practical arts: smithing, mechanics, engineering. Crocell is the spirit of pure theory. If you want to build a bridge, call Vapula. If you want to understand the geometry that makes the bridge stand, call Crocell.
Focalor (41st spirit, duke, 30 legions) kills men and drowns them, and has power over winds and seas. Focalor is destructive water. Crocell is constructive water. Both command legions of water spirits, but their intentions are opposite.
Zepar (26th spirit, duke, 28 legions) causes love and makes women barren. Zepar is emotional and manipulative. Crocell is intellectual and straightforward. They share the rank of duke but share nothing else.
By legion count, Crocell’s 48 is high for a duke. Only a few dukes exceed it, such as Amon (40 legions, but Amon is a marquis, not a duke). This suggests that Crocell holds considerable authority within his rank.
What People Get Wrong About Crocell
The most common error is assuming Crocell is a demon of destruction because he controls water. Floods and drowning are not his domain. He freezes water, which is an act of stillness, not violence.
Another mistake is treating Crocell and Procel as separate spirits. They are the same entity, with a spelling variation that arose from scribal errors in the 16th century. Weyer’s Procel and the Goetia’s Crocell are identical in powers and seal.
Some beginners believe that all Goetic demons are evil and must be bound with threats. Crocell belongs to a class of spirits that are neutral or even benevolent toward serious students. He will not harm a respectful practitioner. He will simply refuse to appear if the intent is impure.
A final misconception is that Crocell can be summoned casually. Like every Goetic spirit, he requires preparation: a clear purpose, a proper circle, and the correct seal. Treating him as a parlor trick invites silence or, worse, a misaligned manifestation.
FAQ
Is Crocell dangerous to summon?
No. He is considered one of the more benevolent Goetic spirits, but any invocation should be done with proper protective measures and a clear, respectful intent.
What does Crocell’s seal look like?
It is a complex geometric sigil composed of intersecting lines and curves, often inscribed within a circle. The seal is reproduced in the Ars Goetia and in modern editions of the Lesser Key of Solomon.
Can Crocell help with mathematics or geometry?
Yes. He is specifically said to teach geometry and the liberal sciences, making him an ideal spirit for scholars, students, and anyone working with structured knowledge.
How does Crocell differ from Buer?
Buer teaches philosophy and herbalism, associated with earth and healing. Crocell teaches geometry and the liberal sciences, associated with water and abstract knowledge. Buer heals the body; Crocell sharpens the mind.
The Place of Crocell in the Goetic Landscape
Crocell stands apart in the Goetic hierarchy as a spirit of measured learning and fluid wisdom. For those who seek to understand the structure of knowledge itself, he offers a unique path. Explore our guide on working with Goetic dukes for practical invocation methods, and visit our demonology hub for more comparisons across the Ars Goetia. For a deeper look at the symbols used in these workings, see our glossary of Goetic seals.