At a particular Bible study, witchcraft is a subject. Why is it necessary to know about witchcraft?
2 Chronicles 33:6
ESV - 6 And he burned his sons as an offering in the Valley of the Son of Hinnom, and used fortune-telling and omens and sorcery, and dealt with mediums and with necromancers. He did much evil in the sight of the Lord, provoking him to anger.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.