Hearthpwn

This deck has worked really well for me so far. Im currently 30/12 and climbing like a mad man, but the samplesize is still not big enough to tell if this is actually a meta-breaker. It has good chances against almost every deck (I somehow lost 3 games against Shudderwock combo Shaman but i had really bad draws in all these games as well).

It usually generates enough cards to not run out of fuel, and with all the direkt damage Elementals it has very big swing potential, there were many games which i should not have won, but thanks to Fire Elemental, Blazecaller and Stone Sentinel you can get back on the board in a hardly comparable way. Shudderwock basically works like Yogg-Saron, Hope's End. It randomly damages minions, heals some, adds Elementals to your hand and draws a few cards. Playing an Elemental before Shudderwock can give it Divine Shield and Taunt though, and with the Saronite Chain Gang duplication can lead to hefty Taunt walls. The second Prince Keleseth buff comes in handy as well.

Alternatively, Shudderwock can also be used to evolve your other minions with Thrall, Deathseers Battlecry. It might look like there is an anti-synergy between these two, but usually you win the game with one or the other, very rarely do you play both.

Fire Fly is not needed in this deck, since it has enough Elementals without the "If you have played an Elemental last turn" requirement. Also, having Prince Keleseth as the lowest costing minion, makes it almost impossible to not get him out before at least turn 5, since you can draw him or the two Witchwood Pipers ( which, in turn, draw Prince Keleseth). If you got the prince out of the deck already, the Witchwood Pipers turn into "Taunt-drawers" which can help you with some healing from the Hot Spring Guardians or a better wall in Tar Creeper.