"Ravens are just what we have always used, I think. I suppose it is because they are clever birds and always return back to where they roost. They're dark against the sky and very distinctive, so you wouldn't accidentally kill one for your supper like a pigeon, and they fly very quickly. All of those things make them our choice in the end."

Simply calling his name would allow him to hear? What sort of power is that? Sansa doesn't know it.

"Did you learn that sort of magic here or did you know it from your book?"