Do not try to balance this game with cards from packs purchased with players’ money or in-game gold.
The game should be completely chance-based and random, as it was when it was first released, and balancing should be based on improvement, not on reducing chance.
If you love and care about this game as much as the players do, please remember that this is not a money-making application and you will earn more if you do the right things. Don’t let Hearthstone die!