Quote Originally Posted by ragawaga View Post
I tried blood furnace, but failed at that big head guy on the gauntlet type bit before it. My mana just didn't last out. I was nuking them fine, but when it got to the last group...there was no mana left. I swapped in my paladin (80) and done that boss with him. I then swapped my shaman back in for the rest of the instance....surprisingly, they allgot the achievement....thought it would've been for doing all the bosses.
The all bosses thing only started in northrend.