A silvery-white, translucent stream of light burst rapidly from the tip of his wand, transforming swiftly in midair into the shape of a huge, dragon-like creature that lunged straight at the Dementor.
His magical power was so immense that the weakened, Boggart-transformed imitation of a Dementor was sent crashing against the wall with almost no resistance, dissolving into a puff of black smoke.
Evidently enraged by this sudden attack, and sensing the deep-seated terror lurking within the old wizard's heart, the Boggart instantly shifted its shape once more.
Chapter 34