-edit. Renly's was surprising? After Mel birthed the shadow? Also wasn't expecting Snow to get Julius Caesar'd like that.
Maybe I'm mixing things up but I thought we didn't see the shadow being born until after Renly's death when Davos sneaks her under Storm's End, she births a shadow in front of him and it kills Courtnay Penrose.

Never thought he was talking bout them even though the hound has proven to be an absolute beast. I'm rereading them now to see what I overlooked before. I'll payextra attention around that part this time.