"The moment the diadem and the cup are destroyed, I'm going to use Nagini to change the magic of the Dark Mark. The Dark Bastard's body was created by magic. The moment he dies, the Dark Mark will start to syphon the magic and lifeforce of his followers. They'll die tonight. They had their second chance years ago and still didn't change their ways. Just because their leader will be gone, they won't stop. We have to get rid of them as well."