For her power had taken Harry's breath away during the ritual to destroy McGonagall's Horcrux. Harry had always known she was gifted. Of course she was, this was Hermione, more brilliant than anyone he'd ever known. He knew, even though he'd been too shy to say, that she was clever beyond the books she used to shield her modesty, but he had no idea quite how potent she was. He had struggled to hold her magic steady when he drew it from her, and was reduced to taking only a fraction of the amount he otherwise would have.