Hearthpwn

The idea behind this deck is stall until lategame, where both your quest completes, and you get combos with Bertrug + plottwist and vectus @ deathrattles AND ebonlock + sathrovarr for refill the board with powerful demons, almost like 4 n'zoths.. incredibly powerful vs other control decks..

Twist and hope betrug pulls 2x dreadlord and 2x collossus scrapyard or ebonlock for crazy powerful board swings and deathrattles that syngergize with Vectus for evne more crazyness :)

Survive the early and mid game by playing soul fragment minions and get heals, get some taunts down and clear the board, and draw alot of cards in the process with tapping and from the soul fragment stuff which should count.

 Go crazy with a Kel'thuzad + hellfire combo for 9 mana, and clear his board, while u summon a full board yourself!

Dark Skies works too, or any of the other soul fragment spells for removal + kel

Against Aggro Mulligan for: Dark skies, Question Explorer, Spirit Jailer, Soul Shear, School spirit, or hellfire (if u have soul u can keep void drinker also for nice 5 mana taunt)

Againts Control mulligan for: Questing explorer, spirit jailer, Twisting Knowledge, Voiddrinker