As for her high marks in the supposedly easy subject of charms, it was definitely paying off as she removed the acrid smell of cauterized flesh from the makeshift hospital that was the Great Hall. Dark Magic was used extensively in the battle, and many wounds were hexed specifically to not heal on their own. It was a horrible solution that most Healers would not have considered, rather letting the corruption slowly creep across the body as a slow-moving cancer that would eventually prove fatal; but Poppy saw the results and agreed that Narcissa's radical treatment was for the best.