Mecha’Thun Priest RoS

you have to draw like crazy with Wild Pyromancer +Acolyte combo, Northshire Cleric, Loot Hoarder and Gadgetzan Auctioneer. Then you can finish the combo on turn 10

turn 10 have in hand Mecha'thun, Coffin Crasher, Auchenai Phantasm, Divine Hymn, 2x Regenerate, Circle of Healing or 1xRegenerate and 2x Circle of Healing. 

You need to have at least 7 HP! Drop Auchenai -> Coffin Crasher, cast Divine Hymn then cast on ‘thun 2x Regen and 1x circle BOOM you win :D!