Choronzon is a demon that originated in writing with the 16th-century occultists Edward Kelley and John Dee within the latter's occult system of Enochian magic. In the 20th century he became an important element within the mystical system of Thelema, founded by Aleister Crowley, where he is the "dweller in the abyss", believed to be the last great obstacle between the adept and enlightenment. Thelemites believe that if he is met with proper preparation, then his function is to destroy the ego, which allows the adept to move beyond the abyss of occult cosmology. Spelling variations Including Crowley's spelling of the name, Choronzon, there appear to be three alternatives. Meric Casaubon states that the name is Coronzon (without an 'h') in his True and Faithful Relation…. However, this is at variance with the spelling that appears in John Dee's own journals. Laycock's Enochian Dictionary gives the latter spelling as Coronzom, citing an original manuscript (Cotton XLVI Pt. I, fol. 91a) as the source for the variant. A.D. Mercer's Liber Coronzom discusses the question of spelling in some detail and includes images taken from Dee's original diaries and from Casaubon's True and Faithful Relation... showing the differences. Choronzon according to Crowley Otherwise known as "the demon of dispersion", Choronzon is described by Crowley as a temporary personification of the raving and inconsistent forces that occupy the abyss. In this system, Choronzon is given form in evocation only so it may be mastered. Crowley states that he and Victor Benjamin Neuburg evoked Choronzon in Bou Saâda, Algeria in December 1909. In Crowley's account, it is unclear whether Choronzon was evoked into an empty Solomonic triangle while Crowley sat elsewhere, or whether Crowley himself was the medium into which the demon was invoked. Nearly all writers except Lawrence Sutin take him to mean the latter. In the account, Choronzon is described as changing shape, which is read variably as an account of an actual metamorphosis, a subjective impression of Neuburg's, or fabrication on Crowley's part. The account describes the demon throwing sand over the triangle to breach it, following which it attacked Neuburg 'in the form of a naked savage', forcing him to drive it back at the point of a dagger. Crowley's account has been criticized as unreliable, as the relevant original pages are torn from the notebook in which the account was written. This, along with other inconsistencies in the manuscript,