witchcraft

Short definition from Wiktionary

Noun

1. 1
   The practice of witches; magic, sorcery, or the use of supernatural powers to influence or predict events.
2. 2
   Black magic; the use of witchcraft for evil means.
3. 3
   Something, such as an advanced technology, that seems almost magical.
4. 4
   An irresistible or seemingly magical influence.