Hearthpwn

Pretty Whacky combo deck, multiple win conditions but mainly malygos. 

Finja is great pressure at turn 5 to get you to the end game.

Bit more detail:

The idea behind this deck is that Finja is both a strong turn 5 play and also excellent at thining out your deck so it is easier to find combo pieces.

Furthermore, the blue gills are not awful  vs aggro and can get you out of a tight spot.

How to play Finja

The best way is coin or innervate out early.  Then on the next turn trigger if possible. If you can trigger by playing a Murloc Warleader even better because you will have a very strong board instantly.  This helps you get to the end game as the opponent will spend resources on removing free minions.

Deck thinning is also the reason for curator and also to draw Malygos.

Why the C'thun cards

Dark Arakoa is a strong taunt, especially if innervated out.  C'thun played doesn't need to be an end game move just force removal buying time for a Malygos combo. It can also help if your end game malygos combo is just enough to just finish the opponent off.

It also confuses the opponent a bit.

Mulligans

Always keep Finja,

And vs aggro always keep ooze and maybe moonfire/living roots.