Draco’s ears perked up. He had heard his father mention horcruxes before and was putting the pieces of the puzzle together as they bickered. The Dark Lord had made horcruxes, and he was immortal until they were destroyed. That kind of dark magic was palpable, you could feel it when you stumbled across it, and Draco was more than familiar with that type of magic, living in the manor surrounded by dark objects.