Hearthpwn

This is a very fun Discard Warlock deck that can act as Control, Aggro and Midrange depending on what cards you draw/discard throughout the match. 

• Arguably every card that is included is really powerful, but from my experience the strongest is Tiny Knight of Evil who can just snowball so fast, specially if you are holding The Soularium as well.
• Don't be afraid to play aggressively and try to discard your hand as fast as possible for the Quest completion, no need for fancy plays or greed, the nether portal can carry.
• With two Soulfire, two Doomguard and two first of jaraxxus, there is potentially a lot of lethal reach within the deck.
• Malchezaar's Imp is very strong but can also force you into fatigue really quickly, keep and eye on that and get rid of it when needed. It also pairs well with Cataclysm.
• The Soulwarden can get us a lot of value, and since it is one of the most expensive cards, discarding it with Expired Merchant can create a loop. Sometimes though all she will give you are multiple copies of High Priestess Jeklik.
• High Priestess Jeklik and Blood-Queen Lana'thel can spell the doom of any Aggro/Zoo/Token decks.

Here is a recorded video of the deck in play (apologies for the quality it is my first recording ever), you can see how quickly Tiny Knight of Evil can snowball and how aggressive the deck can be to seal victory:

If you tried the deck and have any suggestions please leave a comment below, thanks!