The Warrior deck you get is based on synergy to do with your minions taking a small amount of damage, which works well against Grobbulus’s hero ability which deals 1 damage to all minions. So don’t worry about playing minions into Grobbulus’s hero ability and especially play those minions with which you gain an advantage by taking damage.
Beating Grobbulus in Heroic Mode
Winning Anduin vs Thaddius Class Challenge
All Naxxramas Heroic Mode Guides
The best synergy is when you play Armor Smith, which gives you 1 armor whenever a friendly minion takes damage, together with Frothing Berserker which gains 1 attack each time a minion takes damage.
To finish off Grobbulus in the class challenge use Grommash Hellscream, which has a very powerful enrage ability.
auluftwaffles.com, short video game guides 
Pretty sure this challenge is broken. Would be nice to see Hearthstone fix it.
Yeah? And how do you deal with the turn 3 6/8 taunts?
turn 3 8/8 dancing swords is impossible to deal with.
Turn 3 8/8 dancing swords. There is no removal in this deck. I can’t win.
This is one of the least informative and stupidest posts up. You answered absolutely nothing here. You showed nothing other than you know its Garrosh and it uses the typical enrage deck. What a joke this article is.
A list of the ideal starting hand would be nice, as well as how to deal with the buffed oozes that go all the way to 5/6 taunt on turn 4. How best to utilize your weapon, what synergies to play and in what order would help too. As it stands, this article is too general to be helpful. But congrats on getting the front page on google.
This is fucking stupid
If you would elaborate on that thought I might be able to help you out. As it stands I’m not sure what you were expecting from the post and what exactly is stupid.
You don’t mention any specific counters to Grobbulus’s tendency to put out a 1/2 Ooze, and then use Mutation on it to get 2 5/6 taunts. Or when he casts cold blood on a leper gnome. The deck they give you has no charges except for Grom, and only the Tauren 2/3 taunts.