Hearthpwn

Rend was the last boss I needed to take down to get my Nefarian cardback and I managed to do it on my second try with this deck. As always, luck is needed in drawing the cards you need when you need them, but also properly using the ones you have.

In my case, the absolute essential cards are Deathstalker Rexxar as it deals 2 dmg aoe and also closes out the game with its hero power.

Dragonslayer - pretty obvious, deal 6 damage to a dragon which is basically all he plays, and there are several minions that it can be used against.

Wing blast is very useful, there are several minions with 4 health that it can take care off for 1 mana preferably.

MCTech can swing the game big time if you managed to snag a big minion.

Powershot and explosive trap will help get rid of those annoying 2/2's.

I actually played the saboteur and it does make his hero power go to 7 mana which he skipped on that turn and just played a 5/5 dragon consort.

Lone champ is a great taunt, clears 3 of his smaller minions (in theory at least) or forces him to use a removal spell, which he does have a few of.

Spring rocket and glacial shard are useful, but they are susceptible to his 1 dmg aoe spell (it's a warrior spell, can't remember the name but it deals 3 damage to all if his under certain health)

Good luck and feel free to tinker with it if some of the cards don't work out for you like cave hydra perhaps, Rend used removal on it as soon as I played it so apparently he deemed it threatening enough.