Most modern fiction describes werewolves as vulnerable to silver weapons and highly resistant to other attacks. This feature does not appear in stories about werewolves before the 19th century. (The claim that the Beast of Gévaudan, an 18th century wolf or wolf-like creature, was shot by a silver bullet appears to have been introduced by novelists retelling the story from 1935 onwards and not in earlier versions. Unlike vampires, are not generally thought to be harmed by religious artifacts such as crucifixes and holy water. In many countries, rye and mistletoe were considered effective safeguards against werewolf attacks.Mountain ash is also considered effective, with one Belgian superstition stating that no house was safe unless under the shade of a mountain ash. In some legends, werewolves have an aversion to wolfsbane.