Hearthpwn

Preface Information

If anyone has played this match, you already know Chromaggus is a BI***. Every turn he'll spam you with a 3 mana card that will punish you if you don't find a way to get of it. On top of this BS hell you need to manage in your hand, you must also find a way to clear his minions and protect your own from cards like Swipe and Flamestrike.

Here's his complete list of cards and further information to study (I felt like I should study at college the same way I studied this...): Chromaggus Boss Full Deck and Details

It's 4:41am so 6 hours of doing this has gotten me to this point.

Mulligan

*Mulligan means that these are the cards you want to try to start the game with. *

They will be numbered by importance

1. [card]Brann Bronzebeard[/card] <--a must for lakkari activation
2. [card]Succubus[/card] <--perfect early game counter and lakkari activator
3. [card]Lakkari Felhound[/card]<--combo'd with Brann, you'll be happy
4. [card]Tiny Knight of Evil[/card]<-- combos well with any discard 
5. [card]Clutchmother Zavas[/card]<--can help counter the early game

Gameplay

Lakkari Sacrifice will help you immensely in the later game, so you must obtain the quest ASAP. Usually with this deck you can obtain quest by turn 4-6. Chromag will usually play [card]Chromatic Dragonkin[/card] (which will prevent you from casting his annoying spells from your hand, or from using Soulfire) or Faerie Dragon. AOE (Area of Effect) spells for the most part will mostly not clear the whole board, even possibly improving his board. The best card to counter his quick play on turn 2 (and also best order) is Succubus ,then on turn 3 play Brann Bronzebeard, into any other discard card. If you're lucky, you'll have Clutchmother Zavas or Silverware Golem in your hand.

Establish board control till turn 5 and you should be able to handle all of Chromag's bigger threats and get rid of all of his gypsy Brood Affliction cards.

Everyone with a brain bigger than a monkey knows RNG is another BI*** you have to get around. I beat Chromaggus first try with this new deck combination. Any other deck I've tried I needed the stars to align and for my cousin to turn back into a boy. 

Hope this helps.