theurgy

noun pl. theurgies -·gies

1. an occurrence or accomplishment or a sequence of these, esp. when remarkable or extraordinary, viewed as effected by supernatural or divine agency
2. a set of acts or incantations taken to be capable of producing such occurrences or accomplishments

Etymology: LL(Ec) theurgia, a summoning of spirits < LGr(Ec) theourgia < theourgos, divine worker < Gr theos, god (see theo-) + ergon, work