Hearthpwn

This deck is not easy to play. It has good match-ups vs most of the meta (druid and priest). The only glaring weakness is to very fast aggro but that hasn't been common where I'm at right now. (currently rank 8)

Generally the idea is to punt the early game and get to Rexxar. Razormaws are good at any point in the game. Bearshark was a big surprise. The number of removal spells this card deads is staggering.

Tracking has been very good as a replacement for Macaws. The birds would be good because they're never bad top-decks but they don't draw, so they don't get you closer to Rexxar. This is also why Stitched Tracker is no good. 

The deck can win without the hero. VS Priest I generally try to avoid playing Rexxar and go for the tempo win. When he does get involved the game state shifts entirely. 

This deck is difficult to play because you have to decide early if you're going to trade and control the board or push for tempo. If you decide Rexxar is the win condition it alters your whole game plan and hitting the opponent is not worth losing trades. 

Its a great deck but tough to play. Having good games with it and enjoying it though.