similar to warriors mech hero with hero powers that switch every turn.
7 mana/gain 5 armor. Upon activating choose one: a 5/3 weapon, add 3 random dragons to your hand, or some other idea.
Hero powers could include:
Give all dragons in your hand +2/+2
Give your dragons rush this turn
Deal 4 damage to the enemy hero and gain 4 armor
Discover a random dragon