I made this deck to try out the more aggressive use for Kanrethad Ebonlocke; cheating out multiple cheap demons using his Mechwarper-esque effect. At first I was just going to make a Zoolock, but wheres the fun in that. There are multiple cheap demons that synergize with discard effects. Malchezaar's Imp, Tiny Knight of Evil, and Felstalker as well as a few bigger demons Doomguard and the new Nightshade Matron. I also tossed in a couple Flame Imps for the potential explosive opening of Coin + Kanrethad + 1-drop demons and Crystalweaver for some more demon synergy. 

The new card Hand of Gul'dan is a lot of fun for discard warlock and hitting it with Expired Merchant means you pretty much never run out of cards. In addition to the other positive discard effects Silverware Golem and Fist of Jaraxxus it make for a really fun aggressive highroll deck.