Hearthpwn

I'm having a ton of success with this deck so far. Of course, I'm no pro player, but I think this deck is quite good. Let me know what you think, leave a comment, suggest changes, and upvote if you liked it! I'll be updating this deck as I change it. :D

Malkorok

Honestly, I put Malkorok in as kind of a troll card, thinking it wasn't very good but using it because I happened to open it. I think I severely underestimated it. Every time I've played this card it's given me an extremely good outcome. I definitely think this is an awesome card, but if you don't have it and don't feel like throwing around some dust, it's probably not necessary to craft.

Doomcaller 

Really nice late game C'thun buffer, and also lets you play C'thun a little bit more recklessly because you can easily put him back into your deck. Just beware priests! If they entomb it, you can't use this card to put C'thun back in your deck.

Crazed Worshipper

This card isn't anything super fancy, but it is very nice. Wards off aggro and it usually takes a couple hits, buffing C'thun

Disciple of C'thun

This card is crazy good. Basically a mini fire elemental for C'thun decks. Enables execute and helps you kill off minions.

Ancient Shieldbearer

This card is amazing. 10 Armor is no joke, and makes you incredibly tough. Also gives you a ton of damage with Shield Slam.

Twin Emperor Vek'lor

Incredibly good card. 7 mana for two 4/6 taunts is insane value and really helps to stop aggro. 

Only one execute

I was facing a lot of aggro, and was finding that C'thun was always just 1 or 2 attack away from activating Twin Emperor and Ancient Shieldbearer, so I took out exectute and put in more early game C'thun minions.. However, if you're facing more control, especially a lot of C'thun, and you find you're unable to kill the big minions thenfeel free to put in another Execute.

No Grommash

Grommash isn't needed in this deck because C'thun will be your finisher, especially since you can play a second one with Doomcaller.