Invocation

In Western ritual magic, invocations (from the Latin verb invocare "to call on, invoke, to give") are a field involving communicating or interacting with certain incorporeal, supernatural spirits. Invocation may take the form of: Supplication, prayer or spell. A form of possession. Command or conjuration. Self-identification with certain spirits. These forms are described below, but are not mutually exclusive. See also Theurgy.