Hearthpwn

This deck is really fun to play with, and it's actually quite successful against most opponents in the brawl. Basically try to mulligan for Jade Idol, Innervate, and-most importantly-Barnes. Try to play Idol on turn 1, Innervate + Barnes on turn 3. If you're able to play Innervate + Jade Blossom on turn 2, that's even better as you'll be able to Barnes next turn.

Playing Barnes will either give you a Gadgetzan Auctioneer, a Ysera, an Aya Blackpaw, The Lich King or in the worst case scenario another Barnes. With all of these cards except for the Barnes and Auctioneer, you will get some insane effects. Ysera will give you powerful dream cards, Lich King the Death Knight cards, and Aya will summon a Golem on death, and Gadgetzan's effect will still work when summoned with Barnes.

You can remove the Wild Growth if you want, but it can be useful to get Excess Mana in conjunction with Gadgetzan once you're at 10 mana (you don't get this same effect from Jade Blossom. Be careful not to fill your hand with Peruses by playing too many spells with a Gadgetzan out!

Then just keep playing Barnes = win