Hearthpwn

This is a control Hunter, built around a questline shell, freshened up for the new expansion.  Cut both Piercing Shots for one Dun Baldar Bunker (more draw, more good), and Beaststalker Tavish.

[2/14 UPDATE: I just reached legend with this deck, please note the latest changes.  It's got a bit more tech -- which I found useful vs druid and paladin -- the room for which came from swapping both Devouring Swarm for one Resizing Pouch.]

Besides every damage spell you'd expect to see, this deck gains value from Venomous Scorpid and Archdruid Naralex.  These are your primary targets to bounce back to hand with Devouring Swarm.

Just about every card Naralex generates is useful, but importantly the spells he generates are in the Nature and Shadow schools, which buffs the number of cards drawn by Multicaster.

On top of Multicaster and Tracking, Doggie Biscuit rounds out the draw/cycle package. As a bonus to giving Rush to a minion, and drawing a card, Biscuit allows you to save Devouring Swarm for key minions.  And sometimes you even play it to buff a minion.