One of the best cards to appear in Rastakhan's Rumble is Revenge of the Wild, a 2-mana spell that resurrects all the beasts that died this turn. This card can create some serious problems for your opponents, especially in the latter parts of the match-up, when you have your entire board filled with beasts.
Hunter also got a fantastic new weapon -- Headhunter's Hatchet. It costs two mana and potentially has 2/3 stats, if you control a beast. This can be easily compared to the pre-nerf Fiery War Axe, which was universally acclaimed to be the best weapon in Hearthstone.
The rest of the deck includes a hefty number of tried'n'tested beasts and a few removal spells in case you get blocked by a taunt.