"I was useless without it to start, but I learned to work without it. And when you gave me this" he held his arm into the light of the door, the gold letters and silver buckles glinting in the hall light. "You gave me your protection that day. Hermione Granger, the brightest witch of the age, told me I deserved my magic no matter what I had done or not done with it in the past. and then she made sure that no one would be able to take it from me again."