Shadowreaper N'zoth Wallet Priest

This deck is probably a little expensive and a little nuts but it's as intense as it is nuts! Let me know what you think if you try it. It is a wallet deck with many legendary cards. Some of which are mandatory. This deck also requires some calculated plays to get optimal results.

Mulligan

Going First	Additional Options With Coin
Loot Hoarder	Shadow Word: Death
Potion of Madness	Thoughtsteal
Bloodmage Thalnos	Tortollan Shellraiser
Shadow Word: Pain	Barnes
Spirit Lash	Kazakus
Shallow Gravedigger	Raza the Chained

Card Breakdown

Awaken the Makers	This is a powerful card to throw into your strategy with being such a heavy control deck. With the synergy backing this up it's easy to complete.
Loot Hoarder	A reliable card to play early and gets you that one draw closer to the crucial cards of this deck.
Potion of Madness	There's no question that this card can get a lot done, and there's some great deathrattles to steal.
Shallow Gravedigger	A nice 3 drop to supplement deathrattle synergy.
Shadow Visions	This is a fantastic highlander tool, allowing you a second copy of a spell of your choice.
Shadow Word: Pain	Straightforward removal.
Spirit Lash	Love this card. Easy to combo with spell damage, can heal a lot, and has double synergy with Velen.
Shadow Word: Death	Straightforward Removal.
Thoughtsteal	Some may suggest Curious Glimmerroot. I prefer this so it will not pollute your summon/rez pool. Can always use more cards in the long game.
Eternal Servitude	Epic card! Varies in power depending on what minions have died before you play it, but often you can get ridiculous value for 4 mana after your opponent just struggled to remove that minion!
Shifting Shade	Serves the same purpose as Crystalline Oracle.
Tortollan Shellraiser	A very nice taunt to have at your disposal to stifle to protect friendlies or trade with small minions.
Dragonfire Potion	Seeing some more minion-heavy decks lately, so i decided to run this aoe again.
Holy Nova	Classic double whammy priest aoe.
Onyx Bishop	Re-summons one of our numerous valuable minions. Love this card; just time it right!
Raza the Chained	This is a core card. Makes Shadowreaper Anduin insane, and is the entire reason this is a highlander deck. One of my favorite cards in the game.
Shadow Essence	Barnes as a spell, but better. The fact that it is summoned as 5/5 is great because it matters a bit less which minion it is. Very useful.
Prophet Velen	This card adds a lot of fuel to the fire. Most often you will be taking advantage of hero power bonuses, but cranks up aoe as well.
Shadowreaper Anduin	God damn this is a sweet card. Gives you huge board control power and allows you to really spam shadow damage all over the place. A win condition.
Obsidian Statue	This card is insane, it does so many good things. Then you can bring it back multiple times, and get another from Stonehill Defender! Key card.
Bloodmage Thalnos	Not crucial but helps progress the quest and flow of the deck. Spell power is always good.
Polluted Hoarder	Taking advantage of the deathrattle card draw with this card. It may not seem worth it at face value, but it is very nice to re-summon afterwards.
Spiritsinger Umbra	I decided against this card in the past, but now i have thought about it some more and it can get value often with all the deathrattles. Does not work with Skelemancer.
Arfus	So cute! Woof! Death knight cards are really powerful, why not have more?!
Barnes	Progresses the quest and also creates copies which increase resurrection chances of a minion.
Kazakus	Tons of value. If i am going to be running Raza, there's no reason not to run this as well.
Skelemancer	I was originally skeptical, but this card is sweet. Just leave it on the board and let it intimidate. They will have to think twice about using aoe damage! If you get a chance, taunt the bastard up!
Cairne Bloodhoof	Classic and timeless value. Sweet card in a mirror match as well. Not mandatory but very good.
The Lich King	The king, man, you have to have him! Copy him, resurrect him, serve him. Death knight cards will give you a lot of power.
N'Zoth, the Corruptor	Hell yeah i am going to play this. Look at those deathrattles! You can play this earlier if you had some good minions die, but otherwise it's better to save as long as possible.