OTK Penguin Priest

I have found to be a very successful deck, i got over 60% winrate

Of course you have to do a lot of steps, but you can do 30 DMG in one turn

First play Raza

Now become Shadowreaper Anduin

And then on turn 10:

VoidForm (2 DMG)

Prophet Velen (4 DMG)

Mirage Caller (8DMG)

0 mana Spell (8 DMG)

Snowflipper Penguin (8 DMG)