In media, in fan fiction, what does a Witch or Warlock do? They sow corruption. They may have been sowing of the flesh.
Views on Society
Atomism - A belief that society is made up of a collection of self-interested and largely self-sufficient individuals or atoms, rather than social groups. (Liberal Belief on Society)
Organicism - A belief that society operates like an organism or living entity, the whole being more than a collection of its individual parts. (Conservative View on Society.)
(“Political Ideologies An Introduction” Third Edition by Andrew Heywood.)
The Body of Christ is society. Some are the hands, some the feet, some the eyes, some the mouth. We all have a function in The Body. (Ephesians 4:11) Sin, in the body, may have been like a wound. Wounds fester. Given there was a wound, it may need to be addressed. Some people were like a Cancer looking to kill the Body.
A Witch may have been sowing corruption in the body.
One of the best examples of a Witch/Warlock, I have found, with primary documentation, may be Grigori Rasputin. You can watch some free documentaries about him on Youtube. Rasputin was part of an Orthodox Heresy where someone went into mortal sin towards feeling God's forgiveness. He liked prostitutes and engaged in orgies and things like that.
Rasputin was accredited with a miracle. He healed the Tsar's child. Rasputin was also in a lot of sin. He created his own "Coven" with "Well-to-do," noble Russian females. Some of them were married. What he was doing was documented.
A Witch was known as a "Concubine of Satan." We have a figure, Rasputin, in heresy, sowing of the flesh, sowing corruption, with Concubines spreading the corruption for him.
I am aware of a lot. Given you really care to know ask a question.