Hearthpwn

I can't beat this a--hole.

This is my card collection: http://www.hearthpwn.com/members/Drandorin/collection

just play midrange hunter?

I used Midrange Hunter with cards for all 3 of his abilities.

1st: Secret Keeper and Eater of Secrets

2nd: Acidic Swamp Ooze and Eaglehorn Bow

3rd: Expensive cards like Call of the Wild, Lich King, Ysera. These get reduced to 5. 

Any deck that floods the board with minions, mid hunter, zoo, murloc paladin, etc. just don't attack him until you have complete board control and can deal with the deal 3 to all enemies guy as he spawns

I played a random mage with secrets and ragnaros and rafaam *was trolling really* and I won first attempt ... it's quite easy actually

Bog standard swarm taunt druid worked fine for me.

Standar jade druid 

Just played astral Druid for both bosses and it was an easy kill with deathwing and primordial drakes.  Just have kt with a taunt and build a wall

Silence priest plus eater of secrets

Hunter is definitely the best thanks to Flare and Eater of Secrets. Without his secrets, this guy isn't shit. Kill Command and Explosive Shot helps you get rid of the Rotface and Pukeface phases or whatever they are called. And with the Deathstalker Rexxar you can craft huge zombeasts with Taunt and Charge and even Windfury to finish him off quick.

Secret Mage did it for me.
But actually, just build any deck and play Secretkeeper on t1. GG. It reached 11 atk when he managed to kill it.

What else?

idk, I used jade druid for all 3 bosses without any problems, the whole chapter felt way too easy... :D

Dude play hunter  with the standar card i win all bosses 
https://gyazo.com/01df9120861693456c3255df6387df7b
https://gyazo.com/387d901e003bf82dc26abfb6169fb8a8

Thanks to all of you, after five attempts  I finally beat him with an improvised hunter deck.