The denial of it being called magic, or anything like it, made Korra's eyebrows raise in interest. The Avatar had always been adamant that bending was not magic, so she was more than ready to show that respect to Vanessa.

As he hand fades until it is gone, Korra can't pull her eyes away from it and the the wrist that seemed to have nothing there. It could have been an old amputation to any who would see it like that for the first time.

"That's- incredible. Are you the only person that can do it?"