Harry's eyes scanned the room. He was feeling stronger than he had in ages, his magic almost returned to him, when he spotted a ghost speaking with Sirius. Harry wondered if he were a long-lost relative - nothing would shock him about the dead returning, especially not in this room - but Sirius didn't look exactly pleased to see him.
He cast a shield around his godfather and turned away to hex a group of Death Eaters into disarray again.