Learn how to say Necromancy correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word necromancy:
the supposed practice of communicating with the dead, especially in order to predict the future:
alchemy, necromancy, and other magic practices
witchcraft, sorcery, or black magic in general.
Middle English nigromancie, via Old French from medieval Latin nigromantia, changed (by association with Latin niger, nigr- ‘black’) from late Latin necromantia, from Greek (see necro-, -mancy). The spelling was changed in the 16th century to conform with the late Latin form