Hearthpwn

Ain't the new ladder plateau fun :D

Get to see some interesting ones in Standard too! Hell, I got in on the action, bot when I hit 15 and 10.

Have a Priest Quest? How about we try bringing about the prophecy from Ben Brode of a Purify meta. Aggro priest? Tried that one too!

Aggro priest is pretty troll to me :) It works too!

Spawn of Shadows 
Mind Blast 
Argent Horserider 
Kabal Talonpriest
Shadowbomber
Sir Finley Mrrgglton or Shadowform
Holy Champion may be priest's Frothing Berserker, but maybe this is pushing it
Velen's Chosen

These are the main cards I'd start looking at. For the low curve you may fill it with Argent Squire, Smite and Lance Carrier?

N'Zoth Warlock

A rager deck.

Get familiar with the crazy "elemental" synergy that will flood the meta in Un'Goro expansion lol.

Pirate warrior

I used Exodia Mage to counter-cue Control Warriors  :D 
It's a troll deck, but against Control Warrior you basically can't lose. 

Gnomeregan Infantry OTK. 

Fatigue mage, it was already trollsy during its conception in 2015 and the release of expansions and cards like N'zoth have only made it trollier with the comingf of the years.

Golden Basic deck

Mill N'Zoth Rogue