Well, I still play Astral Druid in wild.. If you Astral and top deck this, pretty sure you just win.
EDIT: Let's see... Draw 4 cards with sprint is worth 7 mana, so drawing 5 has got to be worth 8 or 9.. Deal 5 damage is probably worth 3 mana (little worse than fireball which is 4 for 6 damage).. Summon a vanilla 5/5, probably 4.5 mana (little more than a Yeti).. Gain 5 armor is 1 mana (Warrior's Iron Hide).. So we're looking at somewhere in the neighborhood of 17 - 19 mana worth of effects for 1 card that costs 10 mana.. Seems like really good value..