It was used on a witch friend of mine in Prague by a gaggle of hunters that couldn't tell their ass from their elbows, but that isn't the interesting part.

[He leans forward and taps his fingers against the top.]

True, they could have stolen or found one if they got really lucky. There are a few out there that the coven doesn't have a hold of. But the problem with this one is that it's new. Couldn't have been made more than six months ago.