Hearthpwn

Wanna minblast some chump for over 100? 

How about make some poor mage choke down 192 arcane missiles?

Then you've come to the right place!

This deck is all about the Gadgetzan Auctioneer/Shadowfiend draw engine.  With these two cards on the board and a hand full of spells, you will be able to draw through your deck and reduce the cost of your cards.  This will hopefully set up your Prophet Velen/Faceless Manipulator Mind Blast lethal combo.

MULLIGAN

I prefer to mulligan aggressively for both auctioneer and shadowfiend.  However, this approach requires you to  stall for a few turns so that you're able to successfully draw through your deck.

If you want to play to play more conservatively you should mulligan for any draw minions.  It is also wise to consider holding on to cabal shadow priest as opponent's tend to mulligan for aggressive starts (so you can steal Ragnaros or another powerful minion).

CARD CHOICES

Prophet Velen, Faceless Manipulator, Shadowfiend, and Gadgetzan Auctioneer are all required for this deck.  These cards will allow you to draw through your deck and buff your spell damage to unbelievable factors.

Malygos -- Not required but very nice for this deck.  This may substituted with an Ancient Mage (which combos nicely with Brann).

Some similar decks run Chromaggus but I believe that it will very easily lead to overdraw.  Milling Velen would be disastrous.

Brann Bronzebeard should be combo'ed with your pure draw cards, like Novice Engineer, Gnomish Inventor, Azure Drake, and Curator.  This will accelerate your draw potential if you are unable to pull auctioneer early.

You may use any spells other than Mindblast very liberally.  Smite functions as useful removal and together with auctioneer the remaining low cost spells should help you dig through your deck.  Good luck!