Hearthpwn

Heroic Grobbulus' Priest

Hello everybody! Here comes the guide for the second boss of the Construct Quarter, Grobbulus! Despite having a really scary look, he's actually defenceless against a buffed up Stoneskin Gargoyle. So we are going to throw one hell of a gargoyle in his beautiful face! 

Background

Grobbulus has three main weapons in his arsenal, his hero power Poison Cloud, his Mutating Injection buff and the Echoing Ooze he can combo with the Mutating Injection. Poison Cloud will deal 2 damage to all enemy characters (including your hero) and if any of them dies from that, a 2/2 Slime will be summoned on Grobbulus' side of the board. His signature buff, Mutating Injection, costs (4) mana and will give a minion +4/+4 and Taunt, which will make his Echoing Ooze two 5/6 Taunt minions on turn 6+. Apart from that, there's nothing else...

Strategy

1. You want to start the game off by mulliganing for a Northshire Cleric and a Stoneskin Gargoyle. Other buffs such as Divine Spirit and Power Word: Shield are great to kick-start the game too.
2. Turn 1 is all about playing Northshire Cleric so that you can start drawing the turn after. You also want that opening to bait out a potential Slam which could hurt your turn 3 play.
3. If the coast is clear on your third turn, play your Stoneskin Gargoyle and start buffing! Once it reaches 6+ health through Divine Spirits and/or Power Shield: Shield you are good to go with an Inner Fire, Grobbulus will not be able to beat it. Top it off with a Sunfury Protector's Taunt and Grobbulus will never be able to hit your face again.
4. Once your main minion is set, you just need to control the board whilst limiting the damage your buffed Stoneskin Gargoyle is going to take even if that means healing it during your turn. 
5. Beware of the Echoing Ooze+Mutating Injection on turn 6 and after. You should keep a Mass Dispel for that occasion.
6. Final point, beware of your minions' health and if you can't heal them, it is sometimes better to ram them in an opponent's minion instead of giving Grobbulus a 2/2 Slime.

This is a rather straight forward match again, where your main weapon of attack is going to be your Stoneskin Gargoyle and aligning your cards towards buffing him. The most important factor here is going to be you draw at the beginning of the match-up if you don't start with one. Good luck!

If you are having troubles with the rest of the Construct Quarter check my other F2P decks out for Patchwerk, Gluth or Thaddius.

Edit: After reading the comments, retrying to battle Grobbulus, I have made a slight modification. I switched -2 Silences for +2 Lightwells as you need those early heals to prolong the game. Also, Lightwell gives more potential combos for  Divine Spirit and Inner Fire, overcoming the over reliance on Stoneskin Gargoyle.