Hogwarts Choir: [singing] In the cauldron boil and bake / Fillet of a fenny snake / Scale of dragon, Tooth of wolf / Witches, mummy, maw and gulf / Double, double, toil and trouble / Fire burn and cauldron bubble! / Double, double, toil and trouble / Fire burn and cauldron bubble! / Double, double, toil and trouble / Fire burn and cauldron bubble! / Something wicked this way comes!