"The first time Scorpius showed us this book, I thought it was the most boring and useless dust collector I had ever seen." The intruder said. "Invincible Wands? How do we even make them? What do we know about wands? I thought it was one of Scorpius's usual delusions of grandeur and I took for granted that the mission would be a complete failure. I don't mind I was wrong."