Hearthpwn

Mill Shaman

Update:
1. Removed 1 Coldlight Oracle and Added 1 Healing Rain.
You don't need two murlocs in this deck. You can mill the other person completely with just Dancing Swords, Da Undatakah & Shudderwock.  I tested it with no murlocs at all and unfortunately the card draw is not there.   One Coldlight Oracle works much better.
2. Removed 1 Baleful Banker and Added 1 Ancestral Knowledge.
3. Removed Lifedrinker and Added Maelstrom Portal. This works much better for aggro decks  Check out the images. 

Shudderwock, Da Undatakah & Grumble, Worldshaker make this deck a reality.  This is a wild only deck because of Coldlight Oracle,  Doppelgangster and Dancing Swords.  Difficulty in playing this deck would be about a 4-5.

I do not know how well this deck will fair in ranked because of all of the aggro decks but if you want a very fun deck to play, here it is. I have changed out a lot of cards to deal with Aggro.  Best game, I did 151 damage in one turn to an opponent with this deck.  Druid had 30 health and 20 armor when I played Shudderwock.  He ended up with -101 damage by the time it was done.  See the image.

Images do not appear to work.  I click on image and I cannot type in a source so here are links to images of the deck working.

1. https://imgur.com/a/p85xGYr - -101 Damage to Jade Druid
2. https://imgur.com/a/nTAWcuQ
3. https://imgur.com/a/R7xcY9K
4. http://imgur.com/gallery/n7YqVEL - 55 Images - Various Battles
5. http://imgur.com/gallery/DsraaC9 - -85 Damage to Reno nzoth mage

Core Cards
If you do not have these cards, you cannot play this deck.
1. Dancing Swords x 2 - Synergy with Da Undatakah
2. Doppelgangster x 2 - Duplicates Shudderwock
3. Grumble, Worldshaker Legendary - Synergy with Shudderwock.  Returns copies of Shudderwock to your hand and they cost 1 mana.
4. Da Undatakah Legendary - Another key player. Synergy with Dancing Swords, Sergeant Sally & Shudderwock
5. Shudderwock Legendary - Our final key player.  Repeats all battlecrys that have been played that game (Except for himself).  We love you Shudderwock.  You make playing Hearthstone fun!

Helpful Cards
The deck will be extremely difficult to play without these cards
1. Acolyte of Pain x 1, Far Sight x 2, Mana Tide Totem x 2 - These cards are great for card draw.  You cannot replace him with a deathrattle or a battlecry minion because you will screw up Da Undatakah and Shudderwock.  You may be able to replace Acolyte of Pain or Mana Tide Totem with Cult Master but there are a lot of times where you just have no minions on the board so I don't know how much help Cult Master will be if that happens.
2. Crushing Hand x 1 - Deals with big minions, giants or buffed minions.
3. Devolve x 1 - Deals with aggro or murloc decks
4. Healing Rain x 2 - Healing
5. Hex x 2 - Deals with big minions. Has synergy with Zentimo for getting rid of multiple minions.  I faced a druid that had 5 spots on his board filled and I Hex'ed all of them.  He could only play with 2 spots on the board for the entire game because I wouldn't kill the Frogs.
6. Leatherclad Hogleader x 1 - Synergy with Shudderwock. He will gain charge when your opponent has more than 6 cards in his hand.  In the case where Grumble, Worldshaker repeats before Doppelgangster you gain charge for 6 Shudderwocks.
7. Lightning Storm x 1 - Deals damage against Aggro or Super Aggro decks.
8. Sergeant Sally Legendary - Synergy with Da Undatakah which in turn passes this to Shudderwock.  You end up with Shudderwock providing 6 damage for every Shudderwock that burns when Grumble, Worldshaker returns cards to your hand.  Instant board clear.
9. Tidal Surge x 2 - Healing. Synergy with Zentimo for a quick 12 health boost and a combined 15 damage if you have Wrath of Air Totem. 
10. Volcano x 1 - Area of effect. Board clear.
11. Zentimo Legendary - Very helpful with board stall.  If you can get a reduced Hex from Far Sight then you can potentially fill the opponents board with 7 Frog's with taunt.
12. Coldlight Oracle x 1 - It turns out that milling from the deathrattle instead of the Battlecry is much more effective. He is great for card draw, wonderful against decks that rely on keeping their hand with 9 cards every turn. When people see you play him, they want to dump their cards.  I attempted to play without him and lost every game.  I put him back in and started winning again.  I would keep him in the deck. A Booty Bay Bookie and Coldlight Oracle combination is deadly when you want to burn the users cards.
13. Ancestral Knowledge x 1 - I know how people feel about this card being that it only draws two cards and doesn't have the value for the mana cost and overload but this deck needs card draw and this card does not mess with Shudderwock or Da Undatakah.  It is extremely beneficial and has bailed me out of many a mess.  I don't play this card with 2 mana.  I play it as a late game card draw or when the board is looking bleak.  I pull Devolve and PAPOW, back in the game! Devolve and Lightning Storm or Maelstrom Portal; instant board clear.

Replaceable Cards
This card can be replaced but helps with filling up your opponents hand with useless coins so they burn cards.
1. Booty Bay Bookie - This is probably the easiest card to replace in this deck.  It gives you a 3/3 for 2 mana and fills their hand up but since you are playing Shudderwock a lot of the time they are overdrawing anyway so they never get the coin because they already have 10 cards in their hand.  This does help a LOT against warlock decks that rely on card drawing.  9 cards in their hand, Booty Bay Bookie followed by Coldlight Oracle and instantly burn 3 of their cards.  Plenty of burns of N'Zoth, the Corruptor & Bloodreaver Gul'dan which equals instant concede for that deck.  I did use this card and Shudderwock to fill up a rogue's hand with 9 The Coin cards.  Every Shudderwock would have filled up 5 The Coin cards each play had the opponent not conceded next turn.
2. Lifedrinker x 1 - This card was removed from future version.  There is enough healing in this deck to keep you alive for a while.  He was too much mana and not enough benefit.  He does have synergy with Shudderwock. Keeps your life filled as you are taking fatigue damage.  If we remove Coldlight Oracle then there is no necessity for this card unless you want more heal. That synergizes with Shudderwock. You may be better off with more board removal.
3. Baleful Banker x 1 - I removed 2 of these guys and then quickly discovered that you need at least 1 of them.  He has synergy with Shudderwock for adding cards to your deck as the battlecry for Coldlight Oracle is removing them.  He potentially adds a Shudderwock back in your deck in case Grumble, Worldshaker repeats first.
4. Maelstrom Portal x 1 - I added this card to deal with aggro decks.  It works quite well but is a double edge sword.  Many times did it bring out a deathrattle minion... grrrrrr.... That screws up Da Undatakah and Shudderwock.  This can be replaced for a different removal spell.  I like it because of the Area of Effect.

Objective
1. Play 1 Coldlight Oracle.  People are so sick of this card from Mill Rogue, they don't want you playing them again or bringing them back to your hand so they kill them right away.  You can get away with just playing one.
2. Play 2 Dancing Swords and let them get killed.  If you haven't played them before Shudderwock, this is not an instant loss.  They simply have great synergy with filling up your opponents hands with cards if you have been able to play Da Undatakah so that Shudderwock can gain charge from Leatherclad Hogleader's battlecry.
3. Play Sergeant Sally and let her get killed.  Watch out for priest cards that steal her.  I play her turn 3 if I have her.  She gets killed easily.  People get so confused when you play her because she is normally considered a useless legendary.  They don't get it until you play Da Undatakah and then still don't get it because 9 times out of 10 they kill Da Undatakah clearing their board without hitting face first.  When you start playing Shudderwocks and clear their board, then they get it.
4. Play Grumble, Worldshaker and let him get killed.  People go after this card with a passion.  They are so sick of the original Shudderwock deck, they don't want you playing Zola the Gorgon to bring him back to your hand.  They will use 1 - 4  cards from their hand to kill this one.
5. Play Leatherclad Hogleader and let him get killed.  People get very confused when you play this one.
6. Play Da Undatakah and let him get killed.  (If you have already played Leatherclad Hogleader, Doppelgangsters and Coldlight Oracles and this card happens to be the last card in your deck or close to it, you can play Shudderwock to gain the charge effect to either board clear without playing this card otherwise play him and let him get killed.  Don't fret if he gets silenced.  You are not after his deathrattle.  All you want is the battlecry. 
7. Play Baleful Banker and let him get killed.  You don't have to play him on anything.  You only care about the battlecry. 

Combo & Synergy Plays
1. Playing and killing Sergeant Sally prior to playing Da Undatakah will give you an 8 damage deathrattle on Da Undatakah.
2. The deck has a lot of card draw but if you want to get through your cards faster it is better if you don't play Baleful Banker on any cards.  If you throw cards back into your deck then it is less likely to pull your core cards when you need them.
3. If you are going to play Baleful Banker on someone the best minions to play him on are Doppelgangster, Leatherclad Hogleader, Da Undatakah or Shudderwock.
3. Da Undatakah is not a necessity to win if you have played Leatherclad Hogleader.
4. Booty Bay Bookie & Coldlight Oracle combination is a powerful combination.
5. Playing more than 2 Coldlight Oracle cards will screw with your Shudderwock so use caution if he gets thrown back to your hand or you are considering using Baleful Banker on him.  He does help with card draw so there is immediate benefit but it may come back to bite you in the butt when you play Shudderwock.
6. Immediate benefit from battlecry minions is helpful but not necessary for this deck.
7. Play Da Undatakah even if you have not played any deathrattle minions.
8. The hardest cards to get out of your hand are Leatherclad Hogleader, Grumble, Worldshaker & Da Undatakah.  I play these as fast as I can depending on the board.  I do not wait for any benefits from these cards.
10. Playing 2 Da Undatakah battlecries will help out immensely when you play Shudderwock.  So if gets Sapped back to your hand or you can play Grumble, Worldshaker while he is still on the board is fantastic!  Shudderwock would then potentially take on 4 Dancing Swords and 2 Sergeant Sally effects if the battlecries are repeated correctly.  This means, 5 Shudderwock minions that gets destroyed by Brawl or the Grumble, Worldshaker battlecry, for example, each with your opponent draws 4 cards and do 12 damage per Shudderwock to their minions on the board. Oh, Glory Days! :D FEEL THE BURN!!
9. This deck doesn't care if your hand is filled with 1 mana Shudderwock cards like other Shudderwock decks.  If all battlecries were played perfectly in order, Shudderwock will take on the deathrattle of two Dancing Swords (and potentially Sergeant Sally), then multiply himself to have 5 of him on the board, draw cards until your hand is full or close to full, send a copy of himself to your deck, and then return all of the copies of the Shudderwock minions back to your hand burning 3-4 of them causing your opponent to draw 6 - 8 cards and causing 18 - 24 damage to all minions on their board.  You then play the last 1 mana Shudderwock to do it all over again.  If Grumble, Worldshaker is the first battlecry then you have the Leatherclad Hogleader to fall back on.  SO MUCH FUN!

Win Conditions
This deck has multiple win conditions but most revolve around Shudderwock.
1. Non-Shudderwock Win: This deck has some pretty powerful minions and remove spells to stand on its own against most control or midrange decks.  There are numerous occasions where I have won just because I have board control.  They concede or I win and never played Shudderwock.
2. Milling your opponent: This is the objective of the deck.  When you play Shudderwock, you mill the hell out of your opponent.
3. SMOrc: When you play Shudderwock, you put cards into your opponents hand with the battlecry from Coldlight Oracle, Booty Bay Bookie, and the deathrattle from Dancing Swords, clear their board with the deathrattle from Sergeant Sally and SMOrc face with the battlecry from Leatherclad Hogleader.
(If you are wondering what SMOrc is, go here:  https://www.youtube.com/watch?v=-jenlSf2E8o) or watch the video below.

Notes from Creator
The deck is extremely fun to play and is VERY ANNOYING for your opponents.  I hope you have as much fun as I have had with it.  Good Luck. I am sure this deck can be tweaked to be better so if you have any suggestions on how to make this deck better or more fun, please leave them in the comments.