Hearthpwn

Control the board with Jade Claws, Removals and Healings (this deck has can heal over 40 HP) in the early game and rekt the late game by summoning a bigger and bigger man.

Use Murmuring Elemental wisely as you can use it defensively with Jinyu Waterspeaker or offensively with Jade Golem Battlecry cards. Can also use with Deathseer for instant board swings if the situation fits (some RNG may be required).

If you have Grumble in hand, always try to make a play for a value Grumble Battlecry in the next turn. Imagine if you can return a Murmuring Elemental and Jade Chieftain that costs (1) mana back to your hand. The possibilities are endless.

Against Cubelock/Control Warlock this deck is almost an Auto-Win due to 2x Hex, 2x Devolve and Harrison Jones. Always keep these removals in mulligan when fighting against them and play the game slowly. Your win condition is to hex/devolve Voidlords Doomguards and Rin. This is to ensure they won't be revived from Bloodreaver Guldan or N'Zoth. It is normal for games to go till fatigue. Also use Coldlight Oracles whenever the opponent may mill a card or two from a full hand.