Hearthpwn

Play as many Novice Engineer as possible, then Evolve away!  Works best if you can get multiple Evolves per turn.

Remember to attack before you Evolve, just make sure your minion doesn't die.  Try to wait until turn 4 before using your first Evolve.  You want to leave your enemy wondering what your 2nd card is.

Pro tip: Don't attack into a Paladin with active secrets.  It prevents them from playing any more copies of the secret and forces them to deal with your minions without the help of their Avenge or Noble Sacrifice.