Jon Snow's body was also very much supposed to be dead. but he could feel the magic of the ritual somehow sealing and healing his mortal wounds and repairing his heart. He could also feel three faint familial connections inside the ritual circle that were linked with his mind and soul. One of them was much stronger than the rest. He carefully reached out to them and received a mild headache because he was suddenly seeing things from three different points at the same time. His mind was incredibly resilient but still jumbled from the previous events.