Necromancy is a claimed form of magic that involves communication with the deceased, either by summoning their spirit in the form of an apparition or raising them bodily, for the purpose of divination, imparting the ability to foretell future events or discover hidden knowledge. The term may sometimes be used in a more general sense to refer to black magic or witchcraft.
In Renaissance magic, necromancy (or nigromancy, negromancy, by popular association with negro "black") was classified as one of the seven "forbidden arts".
The word "necromancy" derives from the Ancient Greek νεκρός (nekrós), "dead body", and μαντεία (manteía), "prophecy or divination". The compound νεκρομαντεία itself is post-classical, first used by Origen in the 3rd century CE. The classical Greek term is ἡ νέκυια (nekyia), νεκυιομαντεία in Hellenistic Greek, rendered as necyomantia in Latin, and as necyomancy in 17th century English.
Antiquity
Early necromancy was likely related to shamanism, which calls upon spirits such as the ghosts of ancestors. Classical necromancers addressed the dead in "a mixture of high-pitch squeaking and low droning", comparable to the trance-state mutterings of shamans.
Necromancy was widespread throughout Western antiquity with records of its practice in Babylon, Egypt, Greece, and Rome. In his Geographica, Strabo refers to νεκρομαντία (necyomanteis), or "diviners by the dead", as the foremost practitioners of divination amongst the people of Persia, and it is believed to have also been widespread amongst the peoples of Chaldea (particularly the Sabians, or star-worshipers), Etruria, and Babylonia. The Babylonian necromancers were called Manzazuu or Sha'etemmu, and the spirits they raised were called Etemmu.
The oldest literary account of necromancy is found in Homer’s Odyssey. Under the direction of Circe, a powerful sorceress, Odysseus travels to the underworld in order to gain insight about his impending voyage home by raising the spirits of the dead through the use of spells which Circe has taught him. He wishes to invoke and question the shade of Tiresias in particular; however, he is unable to summon the seer's spirit without the assistance of others. The Odyssey's passages contain many descriptive references to necromantic rituals: rites must be performed around a pit with fire during nocturnal hours, and Odysseus has to follow a specific recipe, which includes the blood of sacrificial animals, to concoct a libation for the ghosts to drink while he recites prayers to both the ghosts and gods of the underworld.
Rituals such as these were common practices associated with necromancy, and varied from the mundane to the grotesque. Rituals in necromancy involved magic circles, wands, talismans, bells, and incantations.Also, the necromancer would surround himself with morbid aspects of death, which often included wearing the deceased's clothing and the consumption of unsalted, unleavened black bread and unfermented grape juice, which symbolized decay and lifelessness.Necromancers even went as far as taking part in the mutilation and consumption of corpses.These rituals could carry on for hours, days, or even weeks, leading up the eventual summoning of spirits. Often they took place in graveyards or other melancholy venues that suited specific guidelines of the necromancer. Additionally, necromancers preferred summoning the recently departed, citing that their revelations were spoken more clearly; this timeframe usually consisted of twelve months following the death of the body. Once this time period lapsed, necromancers would summon the deceased’s ghostly spirit to appear instead.
Although some cultures may have considered the knowledge of the dead to be unlimited, ancient Greeks and Romans believed that individual shades knew only certain things. The apparent value of their counsel may have been a result of things they had known in life, or of knowledge they acquired after death. Ovid writes in his Metamorphoses of a marketplace in the underworld where the dead can exchange news and gossip.