One of the fun cards to come out of Mean Streets of Gadgetzan was Weasel Tunneler. This Weasel Tunneler Deck, Discardlock with a Twist is actually a viable deck unlike a lot of the silly decks that just spam more Tunnelers.
The point of adding the Weasel Tunneler into your opponents deck from its deathrattle is to add a junk card that’s going to slow down them drawing into the cards they need.
It works well in Discardlock because the deck uses 1-drops and trades up with buffs. So you can use the Tunneler on board, and you can also try and discard it for extra card draw if you don’t want to play it.
This is the decklist Sjow played to rank 1 legend on the NA server this week. It’s a slightly different discardlock to the 
This is the Thijs High Legend Discard Zoo Warlock Deck he built and was playing on stream. A lot of discardlock lists dropped Darkshire Councilman, but I think this card necessary in this build. Sometimes you need that large threat with a decent health total to survive some of the board clears like Lightning Storm, Holy Nova, etc.
This season is still just a few days old and Xixo has done it again. First he hit 
I played against someone this deck and asked the person to share it. This is a Top 5 Legend Discard Warlock Deck, and being only the second day of the season it’s pretty crazy to be ranked that high. I think this is the best discard list so far. It plays out like a typical Zoolock deck, just make sure you are making the most of the discard synergy to keep the cards being drawn to replace what you’re discarding.