Actually “Dark arts” usually refers to perfectly mundane and ordinary activities like Torture, Anatomy Research, Assassin and Stealth training and Poison making.
Also including true hereticism, but i won’t get into that.
p.s; male witch is called a warlock.
I fail to see how this answer resulted in a negative, perhaps one of you lovely ladies would be kind enough to explain.
If not any of you, perhaps someone else can provide an answer to the exact contrary of my own.