ap·o·tro·pa·ic /ˌæpətrəˈpeɪɪk/
intended to ward off evil.

[Origin: 1880-85; < Gk apotrópai(os) averting evil (see apo-, trope) + -ic]

-Related forms
ap·o·tro·pa·i·cal·ly, adverb

Source: Dictionary.com.

“You might call it a superstitious thing: apotropaic, designed to avert evil – a wonderful word, and God bless for giving me the pretext for using it”

Source: Turn of the Cards, Victor Milán.