Harry Potter and The Goblet of Fire   ::   Rowling Joanne Kathleen

When Harry told of Wormtail piercing his arm with the dagger, however, Sirius let out a vehement exclamation and Dumbledore stood up so quickly that Harry started. Dumbledore walked around the desk and told Harry to stretch out his arm. Harry showed them both the place where his robes were torn and the cut beneath them.

"He said my blood would make him stronger than if he'd used someone else's," Harry told Dumbledore. "He said the protection my — my mother left in me — he'd have it too. And he was right — he could touch me without hurting himself, he touched my face."

For a fleeting instant, Harry thought he saw a gleam of something like triumph in Dumbledore's eyes. But next second. Harry was sure he had imagined it, for when Dumbledore had returned to his seat behind the desk, he looked as old and weary as Harry had ever seen him.

"Very well," he said, sitting down again. "Voldemort has overcome that particular barrier. Harry, continue, please."

Harry went on; he explained how Voldemort had emerged from the cauldron, and told them all he could remember of Voldemort's speech to the Death Eaters. Then he told how Voldemort had untied him, returned his wand to him, and prepared to duel.

But when he reached the part where the golden beam of light had connected his and Voldemort's wands, he found his throat obstructed. He tried to keep talking, but the memories of what had come out of Voldemort's wand were flooding into his mind. He could see Cedric emerging, see the old man, Bertha Jorkins…his father…his mother…

He was glad when Sirius broke the silence.

"The wands connected?" he said, looking from Harry to Dumbledore. "Why?"

Harry looked up at Dumbledore again, on whose face there was an arrested look.

" Priori Incantatem ," he muttered.

His eyes gazed into Harry's and it was almost as though an invisible beam of understanding shot between them.

"The Reverse Spell effect?" said Sirius sharply.

"Exactly," said Dumbledore. "Harry's wand and Voldemort's wand share cores. Each of them contains a feather from the tail of the same phoenix. This phoenix, in fact," he added, and he pointed at the scarlet-and-gold bird, perching peacefully on Harry's knee.

"My wand's feather came from Fawkes?" Harry said, amazed.

"Yes," said Dumbledore. "Mr. Ollivander wrote to tell me you had bought the second wand, the moment you left his shop four years ago."

"So what happens when a wand meets its brother?" said Sirius.

"They will not work properly against each other," said Dumbledore.