Mulligan until you find a Hamlet and a Sylvan Splendor (don't worry if you don't find them, there are plenty of lands that can dig until you find them).

On turn 4 play Sylvan Splendor. You should win the game from here.

Since almost every minion in the deck is an ordinary beast, Hamlet makes them all cost one less, and since the Elementalist gives us one of each threshold, almost all our minions should be free. Sylvan Splendor draws you a card every time you play a minion, so you should be able to play 25-40 minions in one turn.

This deck is somewhat weak to mass removal like Burning Hands, but the game plan against that is to play Wolpertinger, which will be absolutely gigantic from all of the dead beasts.

Happy Stomping!