Summoning a spirit or evocation is the act of calling upon or summoning a spirit, demon, god or other supernatural agent, in the Western mystery tradition. Comparable practices exist in many religions and magical traditions and may employ the use of mind-altering substances with and without uttered word formulas. The calling forth of spirits was a relatively common practice in Neoplatonism, theurgy, and other esoteric systems of antiquity. In contemporary western esotericism, the magic of the g