Hearthpwn

Though many variations on Dragon Priest are Control or long-game oriented, I prefer this variation. It's a more tempo-based midrange deck that seeks to create an unbreakable board state early on and then snowballs into a pretty easy win. This is accomplished by extracting huge amounts of value from Northshire Cleric, Brann Bronzebeard and his merry band of sixteen other battlecry minions, and Shadowreaper Anduin in the late game, and basically every dragon synergy minion.

Also, there's a great amount of removal in the deck, which can be used what might seem to be a bit overzealously in order to keep your early presence going. Once you build your own monstrous board with so much gas you'd swear that you're in an Iraqi oil field and your enemy's board is completely removed to a state of such disparity that they could never recover, the deck has enough longevity to wear down through a lot of healing and just kill the sorry **** while removing everything he even thinks about playing.

In short, outlasts aggro and bursts down control, the apex of midrange and the time your life.