the old wives say it must be the left hind foot of a rabbit shot with a silver bullet or not shot at all simply captured one way or another ideally on the grave of a criminal the more wicked the person the more potent the charm with the foot harvested while the poor creature is still alive it has to be done in a cemetery during the night of a full or new moon though others say it should be a friday a rainy friday friday the thirteenth if the foot is to become one of those lucky ones