In demonology Procell is a strong Great Duke of Hell that has under his command forty-eight legions of demons. He teaches geometry and all liberal sciences. If the conjurer commands it, he will make great noises like the running of the waters and make them roar where there is none; he also warms waters and discovers baths.

Procell is depicted as an angel that speaks mystically and darkly of hidden things.

Other spellings: Crocell, Crokel, Procel, Prucel, Pucel.

See also The Lesser Key of Solomon, Ars Goetia.