This witch could only be killed with a silver bullet. Because of the rabbit's ability to reproduce, the rabbit's foot also became a symbol of fertility. Speaking of reproducing, here are some for the human happy couple. The custom of having bridesmaids and ushers at a wedding came from Roman law, requiring ten witnesses to outwit the evil spirits attending happy events. Ushers and bridesmaids were dressed like the bride and groom so that the Devil would not know who was getting married.
Superstitious numbers are abundant.
Among other reasons for the number thirteen's unlucky nature is Christ's Last Supper, at which there was a party of thirteen. In France, houses are numbered twelve, twelve and a half, and then fourteen. Italian lotteries don't use the number thirteen. Most American skyscrapers don't have thirteenth floors, and airlines omit the thirteenth seats in airplanes. A Norse fable tells of a banquet held for twelve gods.