What is witchcraft?

Witchcraft, also called black magic, is the evil use of supernatural powers. Webster’s defines witchcraft as the act or instance of employing sorcery, especially with malevolent intent: a magical rite or technique. Witchcraft calls upon the powers of the devil much like a believer prays and believes in the power of God.

If you believe in God, and believe in what the Bible says, then you must believe in the powers of evil as well. You cannot take one side and then completely discount the other side. So, evil power is real and witchcraft is the use of it.