*conjuration*

n. [ L. conjuratio, cf. F. conjuration. ] 1. The act of calling or summoning by a sacred name, or in solemn manner; the act of binding by an oath; an earnest entreaty; adjuration. [ 1913 Webster ]

We charge you, in the name of God, take heed; . . .
Under this conjuration speak, my lord. Shak. [ 1913 Webster ]

2. The act or process of invoking supernatural aid by the use of a magical form of words; the practice of magic arts; incantation; enchantment. [ 1913 Webster ]

Pretended conjurations and prophecies of that event. Hallam. [ 1913 Webster ]

3. A league for a criminal purpose; conspiracy. [ Obs. ] “The conjuration of Catiline.” Sir T. Elyot. [ 1913 Webster ]