I had a lot of trouble with the Dark Iron Arena because I couldn’t think of a good way to tackle this boss. His ability is to summon a (free) 1/1 taunt, but he also starts with 3 extra mana and has a deck that consists only of legendary minions. Basically you have to contend with at least 2 new minions per round (one taunt and one legendary).

My first attempt was with a secret Hunter but I quickly switched away from that. My next try was an Animated Armor Freeze Mage, which had moderate success. I basically had to draw/play Animated Armor on turn 4 and then slowly chip away. I could never do enough damage to win though. Finally I switched over to Rogue (I guess Oil Rogue) because I could reliably remove the taunt with my weapon. Here’s my deck:

  • Cold Blood x 2
  • Deadly Poison x 2
  • Buccaneer x 2
  • Pit Snake x 2
  • Betrayal x 2
  • Blade Flurry x 2
  • Eviscerate x 2
  • Sap x 2
  • Beneath the Grounds
  • Fan of Knives x 2
  • Emperor Cobra x 2
  • Tinker’s Sharpsword Oil x 2
  • Assassinate x 2
  • Antique Healbot x 2
  • Vanish x 2
  • Sprint

It still took many tries (under 15) but I was lucky on my winning game. The AI played Millhouse Manastorm and I was able to play a bunch of cards (Sprint, Beneath the Grounds) and buff my Buccaneer. Then I was lucky that the AI drew 2 Nerubians in a row to give me a strong board presence. I was able to remove board presence with Pit Snake/Emperor Cobra, and had their Tinkmaster Overspark heal my last remaining Nerubian into a 5/5 (which was then buffed by Tinker’s Oil). Alexstrasza healed me for a couple of HP and I was able to achieve lethal with my Oil’d weapon + 2 Deadly Poisons and a Vanish.