What is the meaning of "spell" of old English?

I extract the folloing line from Antony and Cleopatra written by Shakespeare.
Could you tell me what is the meaning of the "spell?"
Thank you.

Antony Ay, thou spell! Avaunt! Vanish, or I shall give thee thy deserving,

* You can also see the whole script here:

http://www.opensourceshakespeare.org/views/plays/play_view.php?WorkID=antonycleo&Act=4&Scene=12&Scope=scene