All began in a little village in Scotland. A strange dog was seen wandering in the village with bluish fur. It was abnormally large too. And the next thing the villagers knew, bad luck was striking the village. So the villagers brought some magician and asked him to banish the dog. All his spells did not work on the dog but one of his spells removed one of the dog's tooth. The dog escaped from the village and then the things were back to normal. The magician also discovered that the tooth also granted wishes. But one night the villagers hear a howling from the hill where the magician lived. The villagers hurried towards the house in which he lived, but it was too late. The magician was lying there ripped in pieces and the tooth was lying in a puddle. This meant only one thing: the dog might have come for its revenge. Since then it is unknown whether the tooth is lost or destroyed. If the tooth gets wet the Blue Kerlew is forced to hurt the person who got it wet.