Yeah. There used to be this guy here who made them. Around this time last year, the sky went dark for a month and that creature drove everyone crazy. Some people were affected way less than others, though, and later we found out it’s because the things actually work!

[She holds hers up.]

It's basically a little rock carved with a symbol and then smeared with a bit of blood from someone here with at least one of this place’s super powers.