Hearthpwn

10x legend player here who got very bored with meta and try-harding to get to legend.

I took the challenge of getting to legend with only shaman this season. I was stuck in rank 2 for a long time and fell from rank 1 to 4 many times. I played every single shaman deck you can imagine.  Midrange, Violet Teacher, Mech, Yolo/Burst, Ancestral Healing(Black Knight/Injured Blademaster combo), Malygos, Murloc shaman and in the end the one with the highest (71%) win rate was a modified version of Hotform's Bloodlust Shaman. The main differences are that I swapped out the feral spirit's for deathlords. In my opinion, feral spirits are straight up garbage right now.  Simply way outdated and just garbage taunts even though people still swear by it. Feral spirits are only good good against Control Warrior/Druid matchups and it's not worth having it in your deck for just those matchups.

Against eboladin, feral spirits get consecrated next turn or die to their board while reducing your tempo/mana next turn. Simply garbage.
Feral spirits also give more fuel to hunter's knife juggler+unleash combo. Or just die to their board/one bow charge, etc.  It literally is not worth it. In fact Blizzard should remove overload all together to make it even viable for Shaman. However let's save that discussion for another story.

This deck gets really strong mid-game, so it is important to stop early aggression with two deathlords. If RNG does not love you, always mulligan for flametongue, haunted creeper, zombie chow so that you can start controlling the board. ((((Only applies to aggro))))

Sometimes against matchup's like control priest or control warrior, you do not want to mulligan for deathlords obviously or even if you have it in your hand, don't play it unless you are sure they don't have removal. As sometimes it will end your game right there if you don't have a hex to follow up their removal.

Okay as promised here is the Mulligan guide:

vs Aggro(Paladin/Hunter) : Deathlord, Deathlord, Deathlord, and another Deathlord.
Haunted Creeper, Flametongue, Zombie Chow, 1 Lightning Storm, Earth Shock, Rockbiter Weapon.Nerubian Egg is also good if you have either flametongue or rockbiter to help kill their minion.

vs Mage(Tempo/Mech) : Zombie Chow(Don't play it turn 1, save it for mirror entity), Haunted Creeper, Flametongue Totem, Rockbiter Weapon, Nerubian Egg. Early game/board control is very important in this matchup.

vs Warrior(Patron/Control): Piloted Shredder.Nerubian Egg, Haunted Creeper,Flametongue Totem. If you are facing lots of warrior, and less aggro on ladder, you can swap out a zombie chow for another Piloted Shredder. If you end up being unlucky and getting Deathlord in your hand, play it only when you have hex to follow up whatever comes out against Control Warrior. If Patron, you can yolo it early game and get one of their combo cards to remove instead of having deathlord up turn 8.

vs Priest : Piloted Shredder, Hex, Flametongue totem, Neurbian Egg, Crackle, Mana Tide Totem.  A lot of priest lately have been playing Deathlords. This already is a hard matchup and deathlord is hard to remove for shamans. It feels bad hexing a deathlord but I found it good to use it early instead of letting them control the board. Some priests are not minion heavy early game and you can take advantage of that with mana tide. And whatever you do, do not mulligan for a deathlord obviously. Obviously if you end up playing deathlord, try to keep deathlord's attack 4 with flametongue next to him to avoid it getting dealt with and even hinder their plays.

vs Rogue: Piloted Shredder, Haunted Creeper, Nerubian Egg, Flametongue Totem, Deathlord.
You want sticky minions against this matchup. Try to bait them to waste their blade flurry early so that once two are gone, you can go all in on the board. Don't over-commit your board unless their flurries are gone/no cards in hand. You can also mulligan for a mana tide and have them waste removal on it, if that is the game you want to play against this matchup. Deathlord is not a big factor if it gets killed early game since they have to use a lot of removal and at worst a Loatheb/Piloted Shredder pops out.

vs Warlock(Handlock/Zoo) : I tend to mulligan as if it is zoo, but the card that counters both decks tends to be Earth Shock for Drake/Nerubian Egg value. Haunted Creeper, Nerubian Egg, Flametongue Totem, Piloted Shredder, Rockbiter Weapon, Lightning Storm.

vs Shaman(Mech/Mid-Range) : DEATHLORDS. Most opponents don't expect this and it is amazing as a totem killer, early board control if they don't hex it. Neurbian Egg, Flametongue Totem, Haunted Creeper, Rockbiter Weapon, and  ZOMBIE CHOW. And possibly Lightning Storm.

vs Druid(Ramp) :  Piloted Shredder, Haunted Creeper, Flametongue Totem, Nerubian Egg. 

Optional Cards: Swap in Zombie Chow for another Piloted Shredder if you need more pressure, and facing less aggro. Loatheb, Argent Squire, Abusive Sergeant, Healbot if when your rushing aggro, that extra 8 heal would have won you the game and you are unlucky and cant draw your zombie chow, 2 deathlords, lightning storms(or facing lots of Freeze mage). If you guys have any other things to add, please comment below. Always open to making it better.

Hardest Matchup:  Priest, but thankfully there is not many priests on ladder at the moment. 60% of the priests I face on ladder, tended to have deathlord on turn 3 and if you don't have a hex in your hand or board to kill it, they tend to start to take huge control. Not only that but shadow word pain for our deathlords, or even stealing our deathlord with Cabal/Thoughtsteal sucks. 

http://imgur.com/npOJ1MA
http://imgur.com/uaTeVHw

http://imgur.com/axtQFJG    Beating Reynad with it quickly after
http://imgur.com/URAjdi5

P.S. Ever since sharing this decklist with Hotform on stream and posting it on Hearthpwn : Hotform, JustSaiyan, and Gaara have added double deathlords to their Shaman list. =]  If you find anymore streamers adopting double deathlords let me know!