Isaac
Well there's always bad stories like that. But I was thinking of others. There's stories that say if someone dies and comes back they are always touched by the other side. In myths sometimes they are seers or have other gifts bestowed by that touch.
If she's tied to you still, which she was since the sacrifice and I have no reason to think she isn't now, she's been touched by the realm of the dead twice. The first time Deaton said it left a mark that would never fade.