Hearthpwn

I don't remember having so much fun with HS in ages. Perhaps since Raza got nerfed and K&C came out,nore enjoying a deck so much.  I like looooooong, exhausting  games, decided by who can milk out more values from its cards rather than who draws cards on curve. And i do like RNG, when it helps to make feel the games differents, rather then just deciding if you win or lose. 
I crafted priest's quest Ungoro day 1, even umbra and -sigh- herald volazj, but the deck never really worked out. The deck received a lot of support in K&C with plated beatle and twilight's call, but now Rotten Applebaum gave the final push in terms of sustainability while completing the quest.
As for the RNG, Crystalline Oracle, Bone's Drake, Elise Trailblazer, Arfus and the great Archbishop Benedictus ensure that you never have two games even remotely close to each other.

Deck feels finally consistent enough, in a day i climbed from 10 to 5 and not a single matchup felt inwinnable: paladins (actually the easiest matchup), tempo mage, spiteful druid, hadronox druid, control warlock (hard if they pulls rin too soon and you havent drew benedictus), cubelock,  hunter, even quest rogue (my final boss to rank 5, took me a while but i managed to win).
I even had my first ever draw  due to reaching 50 turns: a crazy mirror match, at the 50th turn we both had full hand, 40 life (+armor) and around 60 cards in our deck. 50 turns where 5 Amara and 4 Ungoro pack's were played.
I understand that not everyone likes super long games, or that the crafting cost of the deck is not exactly F2P friendly (8 legendaries,6  epics), but if you love control decks, look no further, Quest Priest won't disappoint you.

(Here in the pictures a screenshot during the match that lasted till turn 50)

Decklist?

yes baby

I still think quest needs more deathrattle cards to make quest work

decklist i loved quest priest i have a version but it dont realy work on ladder stuck at 10

I believe Kibler's is one of the better versions of quest priest right now. 

Quote from MrShmoove >>

I believe Kibler's is one of the better versions of quest priest right now. 

Kibler's Quest Priest Control Priest Deck by Renii - May 17, 2018 View Deck String Export to BBCode Export to Cockatrice Export to MarkDown Export to Html Clone this deck
Minion (18) 1x Alexstrasza 1x Archbishop Benedictus 1x Bloodmage Thalnos 1x Zola the Gorgon 2x Primordial Drake 2x Bone Drake 2x Crystalline Oracle 2x Duskbreaker 2x Loot Hoarder 2x Plated Beetle 2x Rotten Applebaum	Ability (11) 1x Awaken the Makers 2x Psychic Scream 2x Shadow Visions 2x Twilight's Call 1x Shadow Word: Death 2x Spirit Lash 1x Mind Control	Playable Hero (1) 1x Shadowreaper Anduin
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I got to legend this season using only questpriest. it was suprisingly consistent. I normally only rank to 5 and then play fundecks (was also playing a lot of weasel priest back in the days) but this time I just kept climbing.

I suggest to cut the Mindcontrol and a tip. Be super aware of your mulligans (against EVERY matchup I kept loot hoarder, the cycle just helps so much to find answers on the go).

Quote from Dedsec94 >>

Archbishop Benedictus worth crafting for this deck? I don`t have him.

 He is very good against control warlock (after the opponent plays Azari, you can just refill your deck with his), so I guess it depends on how many warlocks you encounter on ladder. It's also fairly good against control mage, because I feel like fatiguing control mage is the only way to win over them in the long game (Jaina + water elementals just provide too much value for you to to really outvalue them, so having 10 more cards in the deck is one way to win, IMO).
I don't know if I would craft him, though, I'm mostly playing him because I already had him.

Kibler's deck got me to Rank 5 no problem with 13 straight wins.