Hearthpwn

Hi, this is my own deck that im still testing in ranked mode.
My idea is to destroy everything in early game, deal face dmg with minions and help with enemy card to win a late game. You can often win without Tess Greymane. Face Collector i use only for late game if I'm sure that enemy wont kill me next turn.

Aggro:
Against Paladin and Hunter its better to pick:
Backstab, Cavern Shinyfinder, Hench-Clan Thug, Perdition's Blade, SI:7 Agent are good to control board.
Blink Fox, Hallucination can be good to find a help with enemy class cards.

Against Shaman, Priest, Warlock, Warrior, Druid
Play agressive.
Dagger Mastery at turn 2 without attacking + Hench-Clan Thug at turn 3 can be a good early combo.
Blink Fox, Hallucination to find a strong cards that can be later use by Tess Greymane
Elven Minstrel, Fal'dorei Strider to build a board.

When you fight against Shaman, dont destroy his Mana Totem, and use Sap and Vanish to overdraw his cards.

When you fight against Warlock,  keep your Sap and Vanish for late game.

Other good cards that doesn't work for me:
COMBO
Firefly - great tool for combo, kinda useless in turns 5+, I prefer to use Cavern Shinyfinder
Edwin VanCleef - Great card, but I cant find a place for him
Cursed Castaway - Good removal with card drow, but too slow against agro decks

COUNTER
Acidic Swamp Ooze - Card against Warlock
Spellbreaker - Good against Warlock, or debuff one minion against Paladin/ Hunter/ Priest

AGGRO
Doomsayer - Good card, but not enough agressive for this deck. 
Saronite Chain Gang - If you see many aggro decks, play it instead Fal'dorei Strider/ Sap/
Fan of Knives - I find this card usefull only against Paladins 

MORE AGGRESSIVE
Reckless Rocketeer / Leeroy - to win a game, with Cold Blood and Shadowstep 
Cold Blood - can be good to counter early game with Fire Fly
Cobalt Scalebane - strong body that can help to defeat enemy faster 

MORE SPELLS:
Gagdetzan Auctioneer - to fill you hand with cards
Lilian Voss - Good body, will help you to change useless spells in hand
Fan of Knives - Good against Paladins, with card drow
WANTED! - Good removal, works great with Gagdetzan Autioneer and Lilian Voss
Preparation - Works great with Gagdetzan Autioneer and Lilian Voss and with some enemy spells