I found a few images on-line of St Mary, Exterminatrix of Heresies.
BroAJK has listed Mary, the Exterminatrix of Heresies, as a patron of his blog, and requests her aid in keeping him from heresies. I request such aid from her as well.
In a lighter note, I'm tempted to have a caption contest for these two images. I'll start: "Back off! I'm a Virgin with a stick, and I'm not afraid to use it!"
Any else has any ideas, add them in the combox.