Hearthpwn

Warlocks in my opinion possess the strongest Mecha'thun deck as they don't need to empty their whole hand thanks to Cataclysm.

• The game-plan is to empty your deck, reduce the cost of Mecha'thun + Bloodbloom + Cataclysm each by 1 through Emperor Thaurissan.
• The majority of your deck beside from the combo is survival, removal and cycling tools.
• Sense Demons can thin your deck but be careful of your hand size.
• The Soularium is excellent to be played end-game to just draw 3 and discard them if the combo is already set in your hand.
• The reason I don't run hemet, jungle hunter is unlike Mecha'thun Priest, the cheap cards in your deck are either already played early game or are still handy as the match goes on (Defile/Novice Engineer/The Soularium).

For suggestions please leave a comment below, thanks!