Hearthpwn

16 starting cards for druid duel run

16th card is wardens insight 

3 mana, choose 1 spell:

Refresh your mana crystals; Summon a Treant for Each mana crystal you have.

Strategy

Until your first deck additions, The deck is slow and will struggle against mage.

You want to mulligan for sphere, removal or ramp.

You want to avoid your beasts, since the tempo burst is your win condition.

Furthermore:

Deck upgrades automatically suggest the addition of 5 drop beasts, removal, ramp, etc.

Play like guardian druid.

Notes:

With passives and treasures, control can make things difficult.

Once you're certain your ramp, removal and guardian combo's are set, consider adding malygos to finish control decks.

Remember: 

Spell Damage plus swipe is Really Strong,

Turn 9 Wardens insight for 7 2/2 treants into survival is also lethal.