Hearthpwn

Mulligan hard for Hemet, Jungle Hunter against the control decks and simply play it on turn 5 with the coin or on turn 6 which will reduce the deck size and will allow you to do the combo quickly

Against aggro try to survive until they don't have a board or card draws make then run out of resources. Voidlord and Phantom Militia can be used to stop the aggro. Lord Godfrey, Hellfire, Defile, Shadow Bolt and Lesser Amethyst Spellstone are good removal tools. Due to so many removal cards its favoured against aggro decks, I would say.    

The Combo is to play Summoning Portal for 4 mana which reduce the other Summoning Portal cost to 2 mana, when you play that, the Faceless Manipulator in hand will be 1 mana and when you copy the Summoning Portal with Faceless Manipulator then play King Togwaggle for 2 mana which will swap the decks and then you can Azalina Soulthief will only cost 1 and get the King's Ransom. 

So the mana cost will be 4 mana (Summoning Portal) +2 mana (Summoning Portal) + 1 mana (Faceless Manipulator) + 2 mana (King Togwaggle) + 1 mana (Azalina Soulthief) and steal your opponents hand with the King's Ransom

Then you mill you opponent as you will have their deck and hand

Enjoy!!

UPDATE: Replaced Sacrificial Pact for Skull of the Man'ari This pulls out Voidlord without spending mana, empties your hand and helps against Sap 

 Post nerf, one less aggro deck might make this slightly more winnable. 

PS: This is a meme deck and not intended to get you to legend.