Which Witch?

Amman the Awful, the handsome Wizard of the North, has decided to marry. But which witch will it be?
Arriman devises a contest; whoever performs the darkest piece of magic will hecome his bride. Belladonna, the smallest of the coven, wants desperately to win, but she has one problem: she's a good witch. Her spells conjure up begonias and baby birds, not nests of vipers or bloodshot eyeballs. But Belladonna is in love, and she's determined to do something sinister in time for the contest. . . .