Combo: Double conditioning buff to Blackhowl and make it 14 health + Blackhowl + Bladestorm.
But most of the time, opponent have minions too. In this situation Lord Barov + Shield Slam or Broom can clear everything before the combo in the same turn. You need 14 mana crystals, so you have to reduce your combos cost total of 4 mana with emperor thaurissian. Or you can add some coin generator cards too.
Have fun!