An invocation (from the Latin verb invocare "to call on, invoke") may take the form of: Supplication or prayer. A form of possession. Command or conjuration. Self-identification with certain spirits. These forms are described below, but aren't mutually exclusive. See also Theurgy. Supplication or prayer As a supplication or prayer it implies to call upon God, a god or goddess, a person, etc. When a person calls upon a god or goddess to ask for something (protection, a favour, his/her spiri… (More on Invocation)