Hi!
So I managed to get my hands on the "Over Hill and Under Hill - Nightmare Deck" and I've noticed that "Over the Misty Mountains Grim" deck actually uses two deck symbols. First 10 cards (1/20 - 10/20) have what looks like a figure seen from afar with small trees in the background, remaining cards (11/20 - 20/20) have a goblin with a pony-tail.
I don't yet have the saga expansion itself so I can't check whether it's also the case with the "normal" deck.
Can anyone verify this?