Been in a long, weird drought with no 12-wins while trying to achieve 12s with the 3 classes I hadn't yet (Shaman, Hunter, Warrior). I haven't been doing poorly exactly, but it's seriously not been uncommon at all for me to start 7-0 or 9-0 and then collapse in the 8-10 range. Been having a hard time even hitting 11. Somehow busted out of it with this warrior after starting 1-2 and having very little faith in the deck going much further.
First loss at 1-0 was dirty. Lightspawn played against me turn 4. Then power word: shield, power word: shield, divine spirit to hit me for 18. I drew but couldn't find my owls or any taunt so that was game.
9th win I had to play a yolo bomb lobber to kill a 4-health ancient of war on a board of 4 minions just for a chance to topdeck lethal the next turn. No sweat.
11th and 12th wins were easy wins against the same paladin. First game I got overrun by my own draw engines, hit a big battle rage and started milling cards with cult master. Second game I rushed him down so fast that by the time he could play equality/consecration on turn 6, he had 1 health and I still had a death's bite in my hand.
Anyway, seems like a weird deck to finally succeed with. As I was drafting, it felt like I was taking half an aggro deck and half a control deck and mushing them together, but I guess it started tilting more towards aggro with the Fel Reaver. I was coming off a string of warriors going 9 and 10 wins that all felt a lot more powerful and cohesive. The one before this had Black Knight and Onyxia! Whatever works though.