Tobias "TwoBiers" Graap is the Hearthstone player from Germany who is known for accomplishing the famous “100 in 10” Arena challenge. This is his take on the Quest Druid deck.
Jungle Giants requires you to play 5 minions with 5 attack or more, and as a reward you will get Barnabus -- the legendary minion that reduces the cost of all minions in your deck to 0 mana. With the help of ramp cards like Wild Growth and Innervate, you can finish the quest really quickly.
Other cards like Fight Promoter and Nourish will help you draw more cards -- and since they can be played for free, you will instantly gain a massive advantage on the board. If your opponent gets really lucky and establishes board before you, then you can clear it with the help of Deathwing.