And then Neville Longbottom calmly and eloquently tells Lord Voldemort why he will fail. Voldemort, laughing, sets Nagini on him, and in a flash of light Neville pulls the Sword of Gryffindor out of the sorting hat. In one magnificent stroke, he slices off Nagini's head and destroys the last Horcrux. Harry Potter jumps out of Hagrid’s arms, and pandemonium erupts.