Hearthpwn

Disclaimer: This is a fun deck that I made in about 5-7 minutes. I've not played it that much since the Quest Rogue nerf, but I think it's really fun and you guys seem to like it (10 upvotes + 2k views), so I'll make a guide.

UPDATE: I'll update the guide at 20 likes 

Strategy:

As the title says, this is a Kazakus Mage deck. The deck revolves around playing only one copy of each card. With this in mind, make sure you think about your plays. Just don't throw out cards all willy nilly. This deck can do OK vs aggro with Doomsayer, Ice Block, Ice Barrier, Volcanic Potion, and Tar Creeper. Against control, you can out value with Kazakus and Elise. 

Power Cards: 

Elise the Trailblazer: One of, if not the best value card in the deck. It can flat out win you games vs almost all non-aggro decks. You can take this card out if you're facing a lot of aggro, but otherwise I would say that this card is irreplaceable. 

Medivh, the Guardian: The 2nd best card in the deck. If you do not own this card, DO NOT PLAY THE DECK. 8 Mana 7/7 is a great stat line, along with the Greatstaff. THis card combos well with your 6/7 5+ mana spells. 

Kazakus: If it's in the name, you know it's important. This is the best card in the deck. It can clear the board, grant armor, bring back minions/add demons, freeze, polymorph, buff your minions, SMOrc, draw, do your taxes, and fuck your bitch. All for 4 mana! If you do not own this card, DO NOT PLAY THE DECK.

Archmage Antonidas: Free fireballs. lots of haHAA. This card is optional, you dont have to play it if you don't want to. Can be replaced by Yogg.

Alexstrasza: Very powerful card. Learn how to use it. If you're about to playing vs aggro you will mostly have to Alex (If you're still alive, xd). Can also be used so your Ice Cuck doesn't get popped. When Alex hits the board, your opponent will most likely have  have to deal with it. If not, they are just a fireball-ping away from death. If you do not own this card, DO NOT PLAY THE DECK.

Primordial Glyph: The 1st/2nd best card Mage got in Un'Goro. It can get your the final burn you need, stall, or utility such as Cabalist's Tome. If you do not own this card, DO NOT PLAY THE DECK.

Mulligan:

Mage:

There are 3 mage decks going around atm. Freeze, secret, and control. Mulligan vs Mage can be tricky because you have guess which one you are facing.  

Keeps: Look for early game minions and.or cards to take with Mana Wyrm as this card can get out of hand if they open the nuts.

Mana Wyrm: Snowballs at times. I like to call it the Khazix of hearthstone (Press F to pay respects to old Rengar)

Arcanologist: You will always keep this card. It's a 2 Drop with a great body. Also thins out the deck.

Frostbolt: Deals with powerful early game minions like Southsea Caption, Mana Wyrm, Northshire Cleric, etc.

Eater of Secrets: Must keep vs Mage. I'd highly advise to keep it when you're going for lethal. If you use it before hand, they can just put down another secret.

Doomsayer: Deals with early boards.

Druid:

50/50 between Jade or Token. Mage has a VERY ruff time vs Jade. Vs token if you open/mulligan into your anti-aggro cards, you should be fine. Token tends to run out of cards early. If you can last this long either to Alex your face, you should be OK OK. Look for these cards in the mulligan:

Doomsayer: See above.

Arcanologist: See above.

Mana Wyrm: See above.

Tar Creeper: Does ok vs early jades and tokens.

Volcanic Potion: Good vs aggro.

Hunter:

Hunter in 2017 OMEGALUL. Just mulligan the same as you would vs aggro and you should be OK OK.

Paladin:

There's 3 Paladin decks going around atm. Control, mid-range, and Murloc. Same as Mage, this will be hard to mulligan for. I'd suggest to mulligan for aggro as that is the deck I see more. :

Doomsayer: See above

Arcanologist: See above

Mana Wyrm: See above

Frostbolt Deals with early threats like Murloc Tidecaller, Murloc Warleader, etc.

Volcanic Potion: Great vs murloc pally.

Tip vs Paladin: ALWAYS TRADE ON TURN 5/6, Spikeridged Steed CAN BE DIFFICULT TO DEAL WITH IF YOU DO NOT HAVE THE OUTS

Priest: 

Same as Mage and Paladin, there are 3 Priest decks going around atm. Control, silence, and dragon. Priest usually don't do anything turn 1-3 if they have a bad hand beside heal face. If you're like me, they will always have Northshire Cleric Turn 1 followed by Radiant Elemental with Power Word: Shield turn 2. Either way, I'd mulligan for your early game cards like:

Arcanologist: See above.

Mana Wyrm: See above.

Doomsayer Deals with the cheese I mentioned in the Priest overview. Unless they have the Power Word: Pain.

Vs Priest, I feel like you can be a bit greedy and keep cards like: Kazakus, Primordial Glyph, Kabal Courier, and maybe even Elise the Trailblazer.

Rogue: 

I will edit this section later. Quest Rogue got nerfed and I haven't seen the class since.

Shaman:

50/50 between Token and Jade Elemental. I always mulligan for token because that's the deck I see the most. Keep your early game cards and you'll be fine. You may have to Alex your face vs Token. Always fear that they have Bloddlust and play accordingly.  

Warlock:

Press F to pay respects for Gul'dan.

Warrior:

50/50 between Pirate or Quest. MAKE SURE YOU PAY ATTENTION TO THEIR MULLIGAN! IF THEY TOUCH THE FIRST CARD IT WILL ALMOST ALWAYS BE PIRATE!

Vs Pirate: Keep your early game cards like:

Doomsayer: See above.

Arcanologist: Can get you the early Ice Block/Barrier.

Mana Wyrm: See above.

Tar Creeper: Does ok vs early jades and tokens.

Volcanic Potion: Good vs aggro.

Gluttonous Ooze: 5/3 Win Axe? Thanks for the armor. 

Vs Quest:

Same as Priest. You can be a bit greedy since they usually armor up till turn 3ish. You can keep the value cards like: Kazakus, Primordial Glyph, Kabal Courier, and Elise the Trailblazer.

 If you have any questions, feel free to use to ask me in the comments or add me on HS @ EleGiggle #11114 (NA).

If you want to use this in a video, all I ask is that you give me credit. It took me about 2 hours to write this. If I see someone else act like they made this deck I will be salty (Hey Phy).