Severus looked annoyed yet smug as he returned to Auror Headquarters. "The next supposed Dark Lord in Germany would never have been given anything higher than "Dismal" in my Potions class." Harry had asked if Severus had turned him over to the local authorities. "He had enough potion ingredients mislabeled already, I simply switched a pair of labels and let Darwin's Natural Selection take its course." Harry frowned at that, uncertain about setting someone up to die like that. "I find it much more expedient to let a weed die on its own before it grows large enough to spread." Harry had to agree as an enraged Fleur came into his office, singed with the smell of charred flesh around her.