This is the best C’Thun Warlock Deck I can find and put 
together. There is a Reno version that is pretty good too, but this is just a stright up C’Thun deck.
I played around 30 games with it and had a slightly better than 50% win ratio, so it’s not a complete washout and is more than capable of holding its own in the META. The lifetap really helps out a lot when searching for C’Thun, a problem other decks without much card draw suffer with.