Though it must be said that in canon, it didn’t take much. After cutting Harry’s arm with a dagger, “Wormtail, still panting with pain, rumbled in his pocket for a glass vial and held it to Harry’s cut, so that a dribble of blood fell into it.”
Though it must be said that in canon, it didn’t take much. After cutting Harry’s arm with a dagger, “Wormtail, still panting with pain, rumbled in his pocket for a glass vial and held it to Harry’s cut, so that a dribble of blood fell into it.”