Hearthpwn

Alright this deck has a basic idea on how to kill the b****. Alex to put the spiders health to 15. And to finish with the Leeroy combo it the next turn. While filling his board with spider tokens and low attack creatures, so you can heal your hero and have them be sent back to your hand.

Now for the tough tactics. 

First kill the haunted creepers at all cost! You want is board to fill up fast. Make him summon the tokens. Do NOT kill the tokens! You want him to have a full board with the tokens, Egg, and Gargoyle. 

Starting hand-try to get fan of knifes, shiv, backstab, Elven Archer,  and some quick healers like the doctor or Earthring.

After you stable the board, heal! Never play more than two heal cards until your hand is two full. The idea is to heal as much damage as he gives out until you draw into the combo of Alex and Leeroy. 

If you find yourself in a tough spot. Assassination will make for a easy kill. If in a desperation situation you use vanish.  SI is also good in destroying big minions, since he's ability works on Spectral Knight. 

Preps  are meant to be throw away cards (so you don't have a full hand), same with Eviscerate, unless you need to kill a big minion.