I'd concur with the other members--best to look into the possibility this was from some local new age religion--wiccan, druid, satanic and so on. My gut feeling says satanic--they like to put "scary" symbols on things to get others riled up.
Fantasy token is a possibility, but this looks like it was handmade using counterstamp tools. Certainly doesn't belong to anything large scale.
Another possibility is cultural, not religious. Are there a lot of goths or metal heads in your area? This looks like a sort of "bad luck talisman" a local death metal band might include with an album. Look at the disc art for Marilyn Manson's "Antichrist Superstar... it's covered with scary "satanic" symbols that don't mean anything.
At any rate, it's an interesting novelty, but not worth anything. It's almost certainly modern and probably handmade or cheaply machine-struck.