Emiggen Druid

Very straightforward: play Embiggen, play big dudes, win.

My take on the archetype is to try to add more survivability against aggro, in my opinion the deck’s main weakness, with more answers to early pressure with BEEEES!!! and Vicious Scalehide, and to add some amount of healing with Ferocious Howl. 

The rest of the deck plays out very simply, it’s a midrange deck with Breath of Dreams to ramp that applies constant pressure thanks to the buffs from Embiggen and the tempo that cards like Faceless Corruptor and Oasis Surger provide. 

The mulligan is also very straightforward, hard mulligan for Embiggen and Breath of Dreams in every matchup, keep only Acornbearer  being the only 1 drop in the deck.

The deck itself is kinda cheap, as the only expensive card you really need is Embiggen for the deck to work and everyone should craft Zilliax anyways.
Feel free to swap out Ysera, Unleashed.