Hearthpwn

Many people seem to have the most problems with Instructor Razuvious, but, truth be told, he doesn't represent any problems besided his Massive Runeblade (just 3 in his deck) and hero power, which he uses pretty stupidly, focusing on controlling the board instead of setting up lethals, when he is way ahead (one swing to your face with the weapon is enough).

Also many people dream of stealing his op Massive Runeblade with Mind Vision and Thoughtsteal, and that is the reason they play Priest. Well, I play Priest here because Deathlord + Shadow Word: Pain = OTP. He has only one, so this reason is pretty minor.

Anyway, what do we need? First of all, DESTROY THAT RUNEBLADE. Mulligan hard for Acidic Swamp Ooze and, yay, someone finally plays him, Bloodsail Corsair. To be fair, the pirate even exceeds Ooze in value! Massive Runeblade has just 2 charges, and boss swings it in whatever he pleases immediately. So both Bloodsail Corsair and Acidic Swamp Ooze remove 1 charge of the weapon, but little pirate costs one mana less! I wonder why a lot of people even forgot this card exists...

Secondary, we need huge minions (5 health is awesome) and some way to taunt them, because always fear that Massive Runeblade. Forget value, you have to dodge the swing to the face, everything else will be dealt with. Plus a bit of a sustain/single removal, Holy Fire, as always, fills that role alone.

Inner Fire is awesome, you always play both here, but don't rely on it too much. As additional options for minions, you may consider old pals Gurubashi Berserker and Temple Enforcer. Definitely Cabal Shadow Priest, since boss runs some targets for it. Maybe Lightspawns, but it becomes 1/1 after 4 damage from hero power, and I don't like it very much in this match-up.

If you have any questions/suggestions/angry reviews, please, write them down in the comments. GLHF!