From Middle English nigromauncy, from Old French nigromancie, nigremance, from Late Latin nigromantia, a blend of niger (“black”) and necromantīa (“necromancy”).
Necromancy; magic involving death.
“Necromancy is the practice of magic involving communication with the dead by summoning their spirits as apparitions or visions for the purpose of divination; imparting the means to foretell future events and discover hidden knowledge. Sometimes categorized under death magic, the term is occasionally also used in a more general sense to refer to black magic or witchcraft as a whole. The word necromancy is adapted from Late Latin necromantia: a loan word from the post-Classical Greek νεκρομαντεία (nekromanteía, or 'divination through a dead body'), a compound of Ancient Greek νεκρός (nekrós, or 'dead body') and μαντεία (manteía, or 'divination').” - Wikipedia
