Infinite Soulwarden Handlock

With the new Expired Merchant, we can now consistently discard a Soulwarden, and after it dies the deathrattle adds two Soulwardens to your hand, which each add a Soulwarden to your hand, which add a Soulwarden to your hand, which add a Soulwarden to your hand...you get the idea. It's similar to Lord Jaraxxus, with more setup required in exchange for not setting your max hp to an extremely risky 15. If you're worried about silence effects on your merchant, then we have Mortal Coil and Shriek to kill it off cheaply.

Shriek, along with Reckless Diretroll, is also used to add a useful cheap card to your discard pool, so you have something to consistently play alongside your endless 6/6s: Potion Vendor to keep you and your minions healthy, Sunfury Protector to keep taunting up, or Curse of Weakness to pacify wide boards.

Many classic handlock cards are useful in such a deck because you naturally maintain a large hand size throughout the game, and have an endless supply of large minions to take advantage of.