"Albus Dumbledore is the greatest headmaster Hogwarts has ever had. Dobby knows it, sir. Dobby has heard Dumbledore's powers rival those of He-Who-Must-Not-Be-Named at the height of his strength. But, sir" -- Dobby's voice dropped to an urgent whisper --
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"The Leaky Song" by Brad Mehlenbacher of Draco and the Malfoys