Phineas Nigellus Black Confirms the Sword of Gryffindor's Powers
Pages 299-305
The trio summons Phineas Nigellus Black to confirm whether anyone had removed the sword of Gryffindor from its case in Dumbledore's office. Phineas reveals that Dumbledore used the sword to destroy a Horcrux. This information confirms that the goblin-made sword can destroy Mystery - Lord Voldemort's Horcruxes, leading the trio to wonder where the real sword might be hidden.
