Hearthpwn

Super aggressive deck. Seems to have a good matchup against Shaman.  Been trying a few different variants and this is the one that I've had the most success with.

For the mulligans, I look for a few different things. If I have The Coin and Razormane Battleguard, I will full mulligan everything else to look for a 2 cost taunt minion. If I have Razormane Battleguard and a 2 cost taunt, Ill look for 2 mana cards such as Power of the Wild/Mark of the Spikeshell.

If I get an opener with Gibberling I will usually mulligan Gibberling on the play unless my hand looks like I can go off within the first 2-3 turns.

Always mulligan arbor up and pride's fury unless you see a reason not to.

I keep my nature's studies for the Gibberling turn unless I have a board already and am just looking for something to help me close out the game. 

First time posting one of my decks hope you guys like it. If you do please upvote my post :)

Mulligan guide

Priest: Decent matchup especially if you get a fast start. Look for early pressure with cards such as Annoy-o-Tron for the divine shield to protect against early removal and Thorngrowth Sentries for similar reasons. Greybough can be an important card in winning longer games against priest especially if you are able to play Mark of the Spikeshell to get an extra copy of Greybough. Voracious Reader can win games if it sticks for a couple of turns. 

Demon hunter: Against Demon Hunter I like Bonechewer Brawler because of Tuskpiercer. This matchup is important to finish before they play Illidari Inquisitor. Mulligan Enchanted Raven if you have the coin. Look for early Pride's Fury to swing the board in your favor.

Hunter: Get an early board with a buff and they have a very hard time coming back.

Rogue: Honestly haven't gotten to play against rogue too much, I would look to win the board early and keep them on the backfoot.

Shaman: If you have the coin, mulligan Enchanted Raven because turn 1 Wailing Vapor from the opponent will beat it. Look for fast starts. Hard matchup if they get a turn 2 Arid Stormer. Important to win the board. An early Greybough can help a lot against Elemental Shaman but watch out for Lilypad Lurker.

Mage: Hard matchup, especially if you don't draw buffs early. Watch out for Combustion positioning. Pride's Fury is important in this matchup to get your minions out of spell damage + aoe range. I like Bonechewer Brawler on 2 to deter hero power.

Druid: Try to mulligan for a fast start, If you're up against ramp you should have a fairly easy matchup. Other Gibberling decks struggle against a fast taunt start, especially with a buff. Early Greybough is a mirror breaker.

Warrior: Very tough matchup unless you get lucky. Need a fast start, or a start with Greybough and Mark of the Spikeshell. Try to play around Bladestorm. If you happen to discover Germination, you can copy a minion with theGreybough deathrattle. 

Warlock: Close matchup, early taunt start with Annoy-o-Tron can help against single target removal. You can play around School Spirits by getting cards like Thorngrowth Sentries and a buff. 

Paladin: Usually easy matchup. Annoy-o-Tron is very good against early buffed creatures. Try to kill their minions before they buff. Watch out for Oh My Yogg!

Not the best guide but I hope it helps atleast a little bit. I'm going to try to push to Legend before the season ends. Thanks for checking out my deck. :) 

 

Update: Just hit diamond 5 with the deck

Proof of the Win/Loss