Hearthpwn

I played this Deck from Rank 3 to Legend with a total record of 21-8. This Deck is a hybrid of a classical Oakheart Druid and a Malygos Druid. I played a lot of Taunt Druid before, but it seems to suffer a bit in the shifting Meta with the rise of the new Zoo Warlock. Additionally, i wanted to play a Deck that is more build around Oakheart, because in the Taunt Deck it is often times more or less dead. So, i play more Dragonhatcher and Drakkari Enchanter to maximize the Power of Master Oakheart. In a first Version i played Hadronox too, but that didn´t work well. And i thought that you need more Dragons, so that Dragonhatcher is less times dead. So i put in Malygos and Moonfire, because latter is also good against Aggro Decks.

The main goal of the Deck is to play Oakheart as sonn as possible, which should win you the game most times (if you haven´t drawn the relevant pieces). Alternatively, you outvalue your opponent, which is a very reliable strategy against Aggro Decks. Against Control decks it can be tough, if you haven´t a big Oakheart, but it is still very possible. Malygos helps too close out games with additional damage of Moonfire.

The Deck is extremely good against Zoo Warlock and should be good against other Aggro Decks. The reason why, is that you have all the Anti Aggro cards in Spreading Plague, Malfurion, Swipe, Primordial Drake, and so on. So you can most times easily survive the early-/ midgame and close it out with some big plays in the late game (Oakheart, Dragonhatcher, Ulitmate Infestation). I had a lot of problems against the Hunter Recruit Deck, because it can also do some insane turns, and that more reliable-/early than you.

Card choices:

I play five Dragons, which is a good amount in my opinion, so you can use your Dragonhatchers also in the late game. Ysera might not be necessary, but it helps, if the game goes long against control decks. Maybe some other Dragon might be a reasonable replacement (another Sleepy Dragon or Deathwing). I play only one Drakkari Enchanter, because it does very less if you draw it and Oakheart should also be good if you don´t recruit the Enchanter. Most times i play it for Tempo if i draw it, because it is hard to setup a turn, there you can use it´s abbility. I added a Greedy Sprite because i wanted more ramp and early game. It can be awkward to recuit with Oakheart, but i think the payoff of an additional ramp is worth it. I also play one Witchwood Grizzly, which is a very nice three attack target for Oakheart and is also very good against aggro decks. 

I play without Twig of the World Tree, because i don´t think it is necessary and too slow. Malygos is more of an additional strategy and not your main win condition. Oakheart should have a similar effect than the Twig.

Mulligans:

I always keep every sort of ramp and nearly always Oakheart, because it is your most important card against all sort of non Aggro Decks and there is no class, except for Paladin, there you can assume a Aggro Deck. There, it might be correct to mulligan it, because Paladin is hyper agressive and you need your answers. Against Paladin i also keep any sort of removal and maybe Spreading Plague. Against Warlock i keep some removal too, because recently most Warlock Decks are Aggro.

The advantage of the deck is, that you can get some easy wins, with an early Oakheart, and it is very good against the aggro Decks.

Here is the exact breakdown of my run:

Warlock:  Zoo: 10 - 1

                 Cube: 1 - 1

                 Hand: 0 - 1

Paladin:  Odd 1 - 0

Shaman:  Even: 1 - 0

                 Shudder: 3 - 0

Priest:  Quest: 1 - 0

Hunter:  Recruit: 0 - 3

               Secret: 1 - 0

Mage:  Aggro: 1 - 0

            Control: 1 - 1

Druid:  Malygos: 1 - 1