"This is why we have to get the horcruxes! This! This bloody war isn’t going to end until they’re destroyed, and you aren’t doing anything – won’t let me try to get them – and people are dying!" Draco had never heard mention of anything called horcruxes before, and his curiosity had been piqued. Lupin had frowned and extracted himself from the arms of Draco’s cousin, and flicked his eyes over toward Draco, frowning and nodding. A blatantly obvious warning for Potter not to talk about these horcruxes, whatever they were, while Draco, ex-Death Eater, was in the room.