Sounds like Perry needs a Hexenspiegel, German for “witch mirror”, which is just one or more ordinary mirrors, but reflects evil back at itself times three.
The best part is that such mirrors are an “active defense”, in that they do the work so you don’t have to sully yourself turning back evil. So, for example, a good Christian could use one without delving into witchcraft themselves.
Maybe Perry should plant some wolfbane in his window box and start carrying a crucifix.
Hmmm...I think thats a bit suspect. If a good christian was to use one of these, although they would not be directly dabbling in witchcraft surely they would be implying that they believe in the efficacy of such things?