"...did I do that?" Teddy completed Harry’s question. "My blood’s kind of unique. There has never been a metamorphmagus and a werewolf at the same time, so my blood can transform, like a wolf, into anything, like a metamorphmagus. My dad had it checked out when a drop of Wolfsbane got mixed with some of my blood by accident and it replicated itself. He absolutley forbade me from ever using my blood like that."