Mid Kuhnight on 21. Aug. 2017.
The only boss I struggled with was Marrowgar, I don't make counter decks because otherwise these adventures are too easy.
Saurfang you don't even need a heavy weapon deck, just go Shaman and take 1 Doomhammer and 2 Rockbiters (Cards pretty much all shamans should have anyway). The rest of the deck can be whatever, just focus on controlling the board until you can hit him with every one of your swings, and make sure at least 2 benefit from Rockbiter.
Deathwhisper I used my Savage Roar Druid deck. The MVP of this game was Moroes, just use a deck that focuses on creating multiple small guys and just overwhelm her, only thing to be concerned about is getting killed by overdraw before her since it's possible for you to be stuck with a full board of 1/1s.
For Marrowgar, basically the key is to not let Bone Spike damage you. I just sorta bashed my head against the wall until I got lucky and was in a position to remove Bone Spike every time he played it. No hot tips and tricks here, I'm afra