Alright this is my c'thun list:
I'm pretty rusty and it really sucks when you don't hit your draws, but if you even draw sorta good it's pretty insane. This is a more grindy deck then other versions like kolento's, where he runs pure cycle and tries to hit a discounted brann + c'thun combo
mine just sits back, survives the onslaught, and c'thun when you need a tempo swing or think they're out of answers. it's really more of a fatigue deck but runs way more minions than fatigue warrior.
also seriously mess around with fool's bane, the emotes i get after a shaman smugly throws a mana tide behind some feral spirits and i wipe it out is so worth it. it functions as a third brawl basically and c'thun warrior almost always has health to spare.