Read this passage:

HECATE. Upon the corner of the moon
There hangs a vap'rous drop profound.
I'll catch it ere it come to ground.
And that distilled by magic sleights
Shall raise such artificial sprites
As by the strength of their illusion
Shall draw him on to his confusion.

William Shakespeare, Macbeth, Act III, scene v
Based on the context, what is the meaning of "sleights"?
A. Religious icons or images
B. Unkind or cruel sayings
C. Clever tricks or deceptions
D. Knives or other weapons