Hearthpwn

 Important.  This is not a ranked deck!  This deck will be awesome in Casual Play.  This deck will not work well in Ranked Play.  It is too slow for the decks you will play against in ranked play.

HAKKAR CONCEDE PRIEST

This is a deck I am experimenting with to see if it can compete with other decks currently out there.  Thus far, it is extremely strong against most decks..  Most people I play concede.  I play casual however, I play against Legend players that play the very same decks that you find in ranked mode.

Update: Removed Radiant Elemental for Divine Hymn and replaced Mind Vision for Gluttonous Ooze.  We needed something to deal with the decks with weapons and Mind Vision only worked for me a few times.  Radiant Elemental was doing nothing for the deck so I replaced it for heal which works really well against aggro type decks so you can stay alive until playing Zerek's Cloning Gallery.

Basic point of the deck is to play steal a bunch of cards from your opponent, play Zerek's Cloning Gallery with Hakkar, the Soulflayer in your deck, play Archbishop Benedictus to add a a lot of extra card to your deck, complete quest, and then play Princess Talanji to pull all stolen or copied minions from your hand.

Don't worry if Hakkar, the Soulflayer is in your hand.  I have won plenty of games with him in my hand.

Inserting Images won't work.  I cannot past the source or type in it. Here are the links:
Odd Paladin: https://imgur.com/a/31VlCeg
Even Mage: https://imgur.com/a/8Kowng7
Odd Paladin & Elemental Even Mage: https://imgur.com/a/zZEjADb
Midrange Secret Hunter: https://imgur.com/a/7YoP0cN
Mage, Paladin, Warlock, Druid: https://imgur.com/a/gt9uhs4
Taunt Da Undatakah Druid: https://imgur.com/a/S07bpEK - Beating Druid with 14 corrupted bloods.
Proof of Kingsbane Rogue Destruction: https://imgur.com/a/zyVbVdt
Evolve Shaman: https://imgur.com/a/32PXtiP

If you have suggestions, please mention them.  If you feel cards can be replaced, please speak up.

Decks destroyed multiple times with this Deck
 - Deathrattle Hunter
 - Spell Hunter
 - Big Spell Mage
 - Pirate Rogue (Non Kingsbane Version)
 - Quest Pally
 - Elemental Mage
 - Odd Rogue
 - Even Rogue
 - Shirvallah Pally
 - Midrange Secret Hunter
 - No Minion Secret Hunter
 - Hanlock (1 for 1 but I drew so badly the first time.  I faced him again and he conceded.  If they get both Giants and you have no answer, it's game over.)
 - Zoolock
 - Discolock
 - Every Druid I have encountered including Quest Druid (Stole all of his 0 cost minions with Archbishop Benedictus
 - Every Warrior I have encountered
 - Control Decks, in general, fall victim to this deck.
 - Elemental Shaman
 - Aggro Shaman
 - Even Shaman
 - Shudderwock Shaman - Many versions (Except the armor version.  That's just crazy)
 - Mecha'Thun warlock (Any Mecha'thun deck period)

Decks that I believe we can beat but have not beat yet
 - Heal Zoo. This is a massively difficult matchup and I typically lose to this deck.
 - Sharmor Up (Shudderwock Armor Up Version)
 - Face Hunter (I have beat them but it is a difficult match up.  They put pressure on faster than this deck can handle)
 - Kingsbane Rogue I BEAT THIS DECK (Faced 1 out of 20+ games and this is the one of the two losses I  had. I still think if we can steal the weapon buffed or the weapon and buffs then we can beat this deck. Once we the weapon I feel like they will concede, especially after playing Hakkar, the Soulflayer and Archbishop Benedictus)

I added Gluttonous Ooze to deal with Kingsbane.  The trick to beating Kingsbane Rogue is to stay alive long enough to use Zerek's Cloning Gallery on turn 9 or coined on 8 with both Obsidian Statue's in your deck.  Use Gluttonous Ooze when Rogue buffs up the weapon and bring Gluttonous Ooze back to your hand with Seance.  You want the rogue to have Lifesteal on the weapon.  He will bring Kingsbane back then you want to utilize the Gluttonous Ooze and Archbishop Benedictus combination. 

This deck kicks ass on almost every other deck out there (save for some super aggro) because you can use your opponents cards against them but you cannot beat Kingsbane like that.  You must get your opponent to concede by keeping the weapon under control and obtaining the weapon after it has been buffed with lifesteal and using it against your opponent.  If you cannot do this, you lose.

Strategy
This deck's power comes from it's ability to use your opponents cards against them and stay alive long enough to complete the quest with Zerek's Cloning Gallery.  I have had many games where my health goes to 1 and I complete the quest and instant 40 health.

The ideal people to have in your deck when you play Zerek's Cloning Gallery are Hakkar, the Soulflayer, both Obsidian Statue's and whatever else deathrattle minions.  It is not game over if you don't have these in your deck, it just means it will be much slower to complete your quest and don't use Zerek's Cloning Gallery until after you play Archbishop Benedictus.

What does Princess Talanji do?
She is a closer or a last resort to some decks.  Especially hunter with you steal Deathstalker Rexxar with Archbishop Benedictus or Devour Mind.  Most of the time, she sits in my hand and I never use her however she has won quite a few games for me when I need to pull big minions out fast.  Watch out for Warlock.  He will be waiting for you to play her so he can play Twisting Nether.  You must get Warlock to play both Twisting Nether cards in his deck before you can play her.  She will also pull out Amara, Warden of Hope so be careful.  I have made that mistake a few times.

What do I do about the corrupted bloods in my deck?
This highly depends on who you are playing.  For instance, if you are playing Spell Hunter and you can obtain Tracking then you can use that to get rid of the corrupted blood if you don't have many cards left.
Archbishop Benedictus adds a lot of cards to your deck so it is highly unlikely that you will pull corrupted bloods before your opponent.  If you seriously don't want to pull it then you could use Seance on Archbishop Benedictus to bring him back to your hand and then play him again next round.  However, this doesn't usually work out well.  I have only had 1 game out of 40+ games with this deck where the Corrupted Blood worked against me and then I played Archbishop Benedictus twice.

If you have very few cards left in your deck and you know they are Corrupted Blood, you can keep 10 cards in your hand to get rid of them.

What is the purpose of Zola the Gorgon?
She is used to either bring Gluttonous Ooze back to your hand if you are playing against Kingsbane or Amara, Warden of Hope to keep the Corrupted Blood cards in your deck under check.  If you use Zola the Gorgon and Seance on Amara, Warden of Hope then your opponent will have to take over 150 total health from you plus 5 armor from Shadowreaper Anduin and any armor or health you obtain and heal.  Use Zola the Gorgon wisely.  She is a very important card.

Core Cards - If you don't have these cards, you cannot play this deck

• Archbishop Benedictus
• Awaken the Makers
• Hakkar, the Soulflayer
• Obsidian Statue x 2
• Shadowreaper Anduin
• Zerek's Cloning Gallery

Important Cards - If you don't have these, it will be very difficult to play this deck.

• Gluttonous Ooze - You can replace this with Acidic Swamp Ooze but then you don't get the armor benefit which is EXTREMELY IMPORTANT against Kingsbane Rogue.
• Eternal Servitude - We use this to bring back Obsidian Statue if it is an option.  You don't need this card but it does count towards quest and can be a lifesaver at times.
• Mass Hysteria & Psychic Scream - These cards are extremely important for aggro decks.  Without them, you will lose against these decks.  It is not a must to have these cards and they are not core cards but expect a lot of losses if you don't have them.
• Seance - This is important to bring Gluttonous Ooze or Amara, Warden of Hope back to your hand after playing them.  If you cannot so this, it would be very difficult to make this deck work for you.
• Shadow Visions - This deck is playable without this card but REALLY hard.  This card allows you to pull out Zerek's Cloning Gallery, Psychic Scream or Spirit Lash if you are playing against aggro.
• Spirit Lash - This is used in combination with spell damage to bring you back to full or close to full health.  Playing this deck without this card would be difficult not not impossible.
• Twilight's Call - This instantly brings back two deathrattle minions and is extremely important to completing the quest.  You can complete the quest without these cards but it would be more difficult.

I don't have.... What can I use to replace?

• Crystalline Oracle - You can replace this with Saronite Taskmaster or Loot Hoarder or Leper Gnome.
  Bloodmage Thalnos - This is a difficult one because he is spell damage and deathrattle draw a card.  You want both for your Spirit Lash.  You could do Volatile Elemental.
• Dead Ringer - I have seriously considered taking this card out because a lot of the time it pulls out something I don't want.  But it still thins out your deck to get you closer to Zerek's Cloning Gallery.  You could use Voodoo Doll or even Arena Treasure Chest although you would have a hard time killing the treasure chest.  You could use Weaponized Pinata because he will put a legendary minion in your hand.
• Devour Mind - This is nice for grabbing your opponents stuff and using it against them, especially in the rare circumstance that you are running short on cards. It is not essential to the deck.  You can use anything else that will get your your opponents stuff.  I have been told by some that this is too greedy in a meta that doesn't reward greed.  You could replace this with Cloning Device, another Eternal Servitude or Coffin Crasher.  I have found this card quite useful against most control or midrange decks but pretty useless against aggro.
• Divine Hymn - You can replace this with Regenerate but it is not as powerful other than it cost 0 mana.
• Griftah - I use this card for strategy plays.  You can easily replace him with another deathrattle minion but he is nice for adding a 10th card to Warlock or Rogue in order for them to burn a card.  It's also nice for adding Keening Banshee to your opponents hand or yours and you can try and use it to get rid of the Corrupted Blood cards in your deck before you play Archbishop Benedictus.  I have been told that this card doesn't belong in this deck.  I find it quite useful.  I actually had someone concede when I played him.  You could replace this with another Eternal Servitude, a second Seance or Coffin Crasher.
• Princess Talanji - She is not essential to the deck at all.  You can add anything you would like.  I would suggest a second Eternal Servitude.  The deck is so powerful on its own that I have only played her perhaps less than a 10th of the games I have played.  I am seriously thinking of taking her out but her synergism is nice with the minions you grab from Archbishop Benedictus or Devour Mind.
• Zola the Gorgon - You can replace her with another Seance. I like her because she puts another minion on the board.

Tips

• Over 98% of the games I have either Seance or Zola the Gorgon in my hand and in most games I have both of them when I play Amara, Warden of Hope.  This will put 2 copies of her in your hand.
• If you are low on health, have Amara, Warden of Hope and Seance or Zola the Gorgon then play them.  Don't take the change of playing Zerek's Cloning Gallery especially if you only have 1 Obsidian Statue in your deck.  Wait until you play Archbishop Benedictus before you play Zerek's Cloning Gallery.

Mulligan

• I keep Zerek's Cloning Gallery
• Keep Mass Hysteria against aggro
• Keep Spirit Lash against Pally aggro
• Keep Gluttonous Ooze and Seance against Kingsbane or other weapon intense decks.
• Do not keep Devour Mind