Hearthpwn

I tried several times with your list and came close a few times but could never quite survive. Overall I ended up making a few changes (with these changes I played through 3 more games and won each time).

Cards I removed,

Psych-o-Tron, Wax Elemental, Execute, Battle Rage, Frothing Berserker I removed both copies if there were 2. 

Cards I added,

Corrosive Sludge x1, Gluttonous Ooze x1, Dr. Boom's Scheme x2, Blood Razor x1, Mountainfire Armor x2

Why I removed these cards,

Psych-o-Tron was too slow, it was a 5 mana 3/4 taunt, the divine shield gets broken by his 1/1 spiderlings or other various low attacks.

Wax Elemental gets destroyed by Crazed Alchemist, so if you want to use this card for a 1 mana taunt towards your quest, that's all it will be. It may stop some early damage but you want board control, not to turtle.

Execute Almost 0 activators in the deck. I did add Blood Razor after removing it however for extra removal and push damage. It also synergises well with Bloodhoof Brave.

Battle Rage Useless card in my opinion. You aren't likely going to have any damaged minions alive. It may synergize now with Blood Razor but I'd keep it out.

Frothing Berserker Dies too quick, nothing to bump his attack insanely high for one turn. He dies after that...

Let me know what you think of my deck tweak for this :)

this is a way better improvement for the deck..... first try btw thank you :D

Thank you for the update! Beat the dragon on my second try with your improvements.