The Heptarchia Mystica (or the Mystic Sevenfold Dominion) is a complete system of planetary magic delivered to the Elizabethan magus John Dee in 1582 through the crystal scrying of Edward Kelley. It details the angels ruling the planets and the days of the week, describes their functions and how to invoke them. Neglected by the Hermetic Order of the Golden Dawn and Aleister Crowley, the Heptarchia was eventually...