It's not a concept that seems altogether impossible for the young man. Ever since he was a young boy, he was taught that for the deeds you in this life you may be chosen to go to Valhalla and fight at the end. You couldn't do that without your soul passing on, as strong and yourself as ever.

"I'd say a continent-wide disease is pretty powerful wouldn't you?" Hiccup remarked steadily, without a missing a beat, "so it's not impossible, right?"