It looks like you have Javascript turned off. This page will not work correctly. Here is how to enable it.
Deal 3 damage randomly split among all enemies.
At the end of your turn, give your C'Thun +1/+1 (wherever it is).
Battlecry: Add a random class card to your hand (from your opponent's class).
The next spell you cast this turn costs (3) less.
Return an enemy minion to your opponent's hand.
Deathrattle: Add a random class card to your hand (from your opponent's class).