Good thing for this thread, otherwise I could have missed studying this particular line in the Torah had I not seen the question here.

Short commentary from The Stone Edition Chumash:

"By definition, sorcery is an attempt to assume control of nature through powers of impurity and thus deny G-d's mastery."

and also:

"Those who engage in sorcery are extremely dangerous to others, because of the corrosive and enticing nature of such activity."