Hearthpwn

This is a Zoo deck that brought me to legendary. It's worst matchup is control Warrior, as they can gain a lot of armor making it difficult to put pressure on them. The style is a mix of early board control, then hitting face mid game while playing your large minions.

Undertaker is a key card, and the deathrattles allow you to buff often, and a lot. It could good to use Leper Gnomes instead of Zombie Chow if you find the healing helps your opponent in the late game too much, but Chow is much much better in the early game.