Anything can be a "core" and this is a perfect example of that.

If it's got a ghost on it, you own it. Doesn't matter if the ghost is holding a pumpkin spice latte, or if it's in a field of poppies. Any ghost imagery will do! Now... for those who REALLY dive in, you most likely have a spirit box, tarot cards, and dowsing rods. If so, I need you as my friend immediately. Let's go ghost hunting!