What Grows (слэш)

Martin doesn’t notice it at first, in the rush of pain and panic. There’s so much blood, he’s not sure if Jon’s breathing; people are crowding around to try and help, and it’s only when they’re in the ambulance, the paramedics giving Jon oxygen and trying to stop the bleeding, that Martin sees it: a slender, translucent red cord that stretches between him and Jon. 
*
After ep 200, Martin and Jon end up somewhere else, with a strange new mark.