Severus was instant in his reaction to the news about the troll. First, he went to check on the stone, only to be met by a shaky Quirinius, who claimed to be doing the same thing he was. Then, the pendant, Harry’s twin, warmed up to tell him that Harry was in danger close to the dungeons. And he ran, with a throbbing leg, just to witness his godson defeat the troll. Surveying the scene, he knew exactly what had happened here. 