"Resurrection isn't its only quality, but it's the one that interests us. Above all, it's the reason I need to have it. Those kids tried to trick me. Since Scorpius died, they've done nothing but repeat that they never built it, hoping to convince me that their dominion over the Dark Arts had limits. But I knew they were lying." He affirmed, with macabre joy. "Scorpius was too eager to get his invincible weapon not to force his minions to work on it, at any cost. They wrote these notes. Everything is there, every step, from the first to the last ritual. They represent proof that they really built it."