Draco carefully picked out the ingredients he needed and dropped them into his bag, but he hesitated before leaving. He had enough to brew one dose of blood-replenishing potion... but what if he needed more? What if Harry needed more? Not just now, but in the future too. What if Harry was right and the only way to destroy the soul fragment inside of him without guaranteeing his own death was the killing curse? They needed a way to ensure Harry’s survival - to try and save him in the worst possible outcome. Draco had already proven he could close the wound, but he presumed a direct killing curse would have an even more devastating effect. Harry really could bleed to death.