Was the practice of witchcraft, conjuration, and other black magic.
Necromancy began to spread between 1200's-1300's. Then it was stamped out buy the Catholic Church and other rulers. Then between 1600-1800 Necromancy made a come back by some surviving root members. Necromancy then spread to America.
The origin of Necromancy is unknown because many of their texts was destroyed but it is believed it started in Scandinavia or Ireland.