Oh the rage! Muha-ha-ha-ha-ha-ha-ha! So I finally had a reason to use my warlock deck (received a warlock domination daily). It is a pretty decent demon deck with just enough other things thrown in to make it very dangerous at times.
This mage I fought (for my final win) was raging by the end. He started off by coin+portal+tauren warrior. I used my hero power to get another card (I could have dark bombed the warrior, but decided not to that turn). He then played both of his mirror entities. So I dark bomb the warrior this turn (nothing else to do and didn't want him enraging it next turn). He then plays the draw 2 cards spell. I play the void caller I just drew. He plays a 2/5+taunt+can't be targeted. I play a Mistress of Pain and kill one of the 4 mirror images. He plays a 5/4(3?)+battlecry 4 random damage if you have a mech (3 hit my hero and 1 hits my void caller) and attacks my hero. I play the do 4 damage to a minion spell and kill the 5/4(or 3) card, kill another mirror image and damage another.
He plays a sludge beltcher and 3 damage freeze spell on my hero and attacks my hero with his 2/5+taunt. I play the +5/5 to a friendly demon on the Mistress, kill the sludge (heal my hero for 6 in the process), and kill the last mirror image (finally almost through all his taunts, just 2 left). He plays a twilight drake and another sludge beltcher. I kill the sludge with the Mistress (another +6 health heal), power overwhelming the void, kill the 2/5+taunt with the void, and shadow flame the void caller killing both the 1/2+taunts from the beltchers and the twilight drake. The voidcaller also deathrattle plays Lord Jaraxx. He fireballs my mistress killing it, I do the +2/2 spell to Lord Jaraxx, faceless manip Jaraxx, and play a Defender of Argus to taunt both Lord Jaraxx. He frost bolts one of the Jaraxx's and plays another 2/5+taunt+can't be targeted and a 2/4+2 random damage when casting a spell. I faceless manip the higher health Lord Jaraxx, cast impolsion on the 2/4 (doing 4). He plays yet another taunt (tazdinga) a secret, and a do 3 random damage to enemy spell (killing 2 of my imps). I pull out the secret stealer, play a sea giant, and +5/5 a Lord Jaraxx, kill the taunt with a Lord and the imps and finally start going to his face. He quits.