Quote from : Entheogens and the Development of Culture: The Anthropology and Neurobiology of Ecstatic Experience Book

Several centuries ago it was believed that the fly agaric, combined with the bufotenin–containing mucus of toads, was an ingredient of witches' brews, which made flying on their broomsticks possible. Even Santa Claus and Father Christmas are connected to Fly Agaric and their reindeer, which, by the way, like their portion of fly agarics and 'living' water.