Hearthpwn

I'm definitely an average Hearthstone player, after three years of play, I've finally hit Legend with this deck.

I modified it a bit while I was climbing the ladder, and with this version I didn't lose a single game between rank 1 and Legend.

Cards I've had in the deck which work, but I've changed when I found them not to be as effective because of the match-ups in specific ranks:

Bloodsail Corsair

Deadly Poison

Shadowcaster I quickly replaced it with Sonya Shadowdancer, you can get more value, and it's cheaper to play. Rarely happens because this deck is so fast, but you can use it as a "mini taunt", opponent will almost always try to kill her asap.

Acherus Veteran

Ironbeak Owl

Fire Fly (I replaced both of them for Pharaoh Cat when Uldum came out).

SN1P-SN4P

I don't trust myself enough to publish a guide, though I think it's a pretty straight forward deck. I just always kept Loatheb against what I though were resurrect Priests (few dragon Priests around), or burn secret Mages. Hench-Clan Thug always stays in my hand.

Note: I know Hooked Scimitar seems redundant in a deck that buffs your weapon, but I found it to be very useful, very aggressive, and buffed by Buccaneer you get a 5/2 weapon for 3 mana which is insane.

Hope I can help someone hit Legend too!