"It's a completely different principle," Lovegood explains with a wave of her hand. "The Avada is called "The Killing Curse" for a reason. It's meant to kill for good. You, on the other hand, died as a result of another curse, the primary goal of which was not your death. Ultimately, what we did is comparable to Muggle methods. They bring people back from the dead all the time, at least when they're too young to die."