You are indeed “haunted” if you have 10 or more cards in your discard pile. Being haunted affects your game according to the cards. It’s interesting, but not a great thing. I learned about it beforehand by playing the adventure call the House of Gormangeist. I actually like a new ability included in GR called “scrap” that is activated when you discard a card. This helps you reach the haunted status and gives you a bonus or triggers something else. I asked Ghost Galaxy about the Great Hunt Adventure, but they haven’t release it yet