@MoeMortem there are probably lots of them, but I remember hearing about one you summon by going to a crossroads and then running your finger down a comb at night. Someone will come and tell you your fortune. Oh and you need to cover your face or something because if you look at them they'll kill you.

There are a lot of really cool myths of spirits and yokai and such popping up and requiring specific things you need to do to get away from them. Eastern Asia and Native American myths like that are particularly cool.