Hearthpwn

So you want to play priest decks but all of them suck, well then this is the deck for you. Kinda not really. Inspired by DaneHS and his amazing Nazmani Bloodweaver deck, the goal is to get a bunch of cheap spells in your hand and then drop a Gadgetzan Auctioneer with a Radiant Elemental and draw pretty much your whole deck, finishing off with a Kazakusan that generates a bunch of broken cards to win the game. However, unlike Nazmani Bloodweaver, Radiant Elemental can only reduce spell costs. This basically means that no matter what Kazakusan will be able to be played by turn 8 at the earliest. Rarely turn 7 with a coin and Priestess Valishj. Speaking of Priestess Valishj, this card is sweet. At worst it's a coin but at best it can make for some amazing turns and can even become a 0 mana 8/8 with switcheroo. 

Ok, but is the deck actually good? My answer is... maybe? What I found is that it was very, very consistent at drawing your whole deck by turn 6/7. Originally, the win condition was Elwynn Boar and while I can whole heartedly say that it is near 100% chance to get the sword online and kill your opponent before turn 10 with that strategy, you will get steamrolled by literally any deck that just plays minions. Having to kill off both boars and trade Amulet of Undying a bunch of times is too difficult and slow. Here's where our guy Kazakusan comes in. While he may be restricted by his mana cost, he offers many different win conditions and responses to the board. With a combination of treasures, you will very often just win if you don't die the turn you play Kazakusan. I think this draw engine shell has a lot of potential and if we see a more consistent "win the game" card like Kazakusan or Elwynn Boar within the next couple expansions this deck might be a real contender for a control killer. However, that's where our issues start.

The meta is not that kind to this deck, like, at all. With some luck you can live to turn 6/7 to begin the drawing process, but sometimes even luck won't save you. The nice thing is that the draw phase will usually heal you to full and kill a decent bit of the opponent's stuff with Shadow Word: Devour and Holy Smite but you still have to avoid enough aggression to actually get your Kazakusan down and not just die immediately. Sometimes the opponent over commits and then you're able to wipe their board, full heal, put some scary looking minions down and play Kazakusan safely, but other times you won't be so fortunate. So it's a toss up, but when it works, damn it's fun. And I'd say above all else this deck is a lot of fun. 

Ok, ok, shut up and just tell me how to play the deck. Fine.

Starting off with the mulligan, you want to aim for Switcheroo or Horn of Wrathion as well as Thrive in the Shadows, Illuminate, and a Gift of the Naaru or Holy Smite if you're up against something like a murloc warlock or mech mage. Throw minions away, the reason for this is that we don't actually play any of them until turn 6 at the earliest so they just fill up the hand and do nothing. Better to draw them later with spells since it kills two birds with one stone and because we want to have a nice, meaty hand of spells. 

Turns 1-5 are going to be slow. You're going to want to end up with a hand that comprises of Priestess Valishj, Radiant Elemental and Gadgetzan Auctioneer and some 0 and 1 cost spells. Turn 1-5 just focus on building up your hand and not dying. If you get low on HP just remember that your turn 6/7 you will pretty much draw your whole deck and heal to full/ kill a bunch of the opponents little stuff. These turns will decide your fate usually and if you can have a clean early game you'll probably win. 

Turns 6-8: The miracle phase. Knowing when to start your draw phase isn't always easy, but you have to be ready to do it since drawing your entire deck and playing a ton of cards takes a lot of turn timer, so you can't hesitate. There's a couple ways to begin the draw phase. The most typical way will be to drop Gadgetzan Auctioneer, play a couple spells, drop Priestess Valishj, drop Radiant Elemental, then play as many spells as possible WITHOUT milling Kazakusan and without fatiguing, the goal being to draw all minions out of your deck so that on turn 8 you can drop our favorite treasure hoarding dragon. Now there's a couple caveats to this. If you go 2nd, you'll have the coin and can make some plays earlier or have the coin give you just the little oomph you needed to start the deck draw process. Sometimes you'll only have 6 mana, have  Gadgetzan Auctioneer, Priestess Valishj, and Radiant Elemental but a bunch of 1 cost spells. If you are in a position where you have to start the draw phase because your opponent's board is threatening, you can play Radiant Elemental first, play out two spells, then Priestess Valishj, then  Gadgetzan Auctioneer, and start the draw process. Make sure you have enough spells to do this, as starting the draw process with only one spell puts you at high risk of hitting a high mana card, being unable to draw anymore, stuck at low HP, and likely lose or play  Kazakusan very late. But you do all that, you draw almost your whole deck, you have a few minions on board, your HP is high, and  Kazakusan is activated. Ideally, you can drop  Kazakusan within the next turn or two. Those two turns can be precarious, but in my experience the opponent usually wastes all that time killing off your  Gadgetzan Auctioneer and Radiant Elemental which doesn't matter. Ideally you save a combination of  Switcheroo, Thrive in the Shadows, and Illuminate if possible for after you play Kazakusan so you can access your treasures more easily.

Quick Kazakusan treasure picking guide: So depending on your matchup you will want to pick up different cards. Against control? Go for big value cards or burn cards if you think they'll remain passive. Against aggro? Life gain cards, board wipes, minion fill, and big minions that they can't kill that gain you the board are the way. Having an idea of which treasures to pick is important, and comes from experience. Sometimes you'll simply end up unlucky and get stuck with a terrible deck. Sometimes you'll have an awesome deck but your opponent simply kills you the turn you play Kazakusan or is able to answer your deck of treasures. But I'd wager that 75% of the time you drop Kazakusan and don't die right after it's a win. Clockwork Assistant is almost always a 20/20 at least. Even if you create Quel'Delar it's usually kinda bad since it reduces your deck to 8 cards instead of 10. Canopic Jars can combo with a lot of stuff but I've noticed that standard legendaries are actually pretty trash on average, and not sure if it was said somewhere but I'm pretty sure Colossal minions are removed from any form of random generation pools. Still good just be aware it can be awful. There's a ton of combos between the cards that I could talk about but just checkout the full list of treasures https://hearthstone.fandom.com/wiki/Kazakusan and get familiar with them. 

Turns 9 and beyond are the homestretch but also the hardest turns usually. Be smart with your treasures and understand your resources are powerful, but limited. Fatigue can be a real thing, but don't let it scare you if drawing more treasures allows you to make big plays. 

Overall, this is mostly a meme/fun deck but it can have some awesome results and the whole drawing your entire deck gameplay has always been really appealing to me and makes for a lot of fun when you play op treasures. 

EDIT: If you have Condemn and Serpent Wig I'd probably replace Focused Will and Holy Nova with those, but I don't have enough dust for those cards so I can't personally test it. Handmaiden and Xyrella might be good additions but they make the minion draw cards worse so maybe not? Idk, I don't own the cards.