Choronzon.
Choronzon is a demon and duke of Hell once summoned by Aleister Crowley. He is described further in his book "Liber AL vel Legis" or the "Book of Law".
Overview[]
It is also called the Dweller in the Abyss or the Demon of Dispersion, and held vast amounts of knowledge. 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.
In a ritual with his follower Victor Benjamin Neuberg, Crowley claimed to have summoned Choronzon within a seal in the Sahara Desert, but could not control it. He further 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.