The ideal line of this deck is to Smallpox on turn 2, discarding either a Bloodghast or a Lingering Souls, and then Vindicate an opponent's land on turn 3. To do this, the land you sacrifice needs to be a Flagstones of Trokair, so you'll need either an Urborg, Tomb of Yawgmoth or a Fetid Heath to pull it off.
This is an ideal line that is difficult to pull off 100%, but the cards involved have enough synergy that missing any particular element only has a minimal effect on the chain's power. Delaying the chain a turn by missing a land, missing the value discard, or not having a Vindicate to cap it off all have a minimal effect on the line of play's strength, and still leaves you ahead of your opponent.
Outside of this main line, there is a general B/W removal package that keeps the board clear as you keep your opponent in check while inching out an advantage. Sacrificing a Bloodghast or even just a token from Lingering Souls to an Ob Nixilis, the Adversary feels great. Liliana of the Veil fits in with everything this deck wants to do. And Dauthi Voidwalker seems like an easy auto-include.
Rankle, Master of Pranks may seem like a strange choice, and if I were playing an Abzan package with Grist, the Hunger Tide instead of Ob Nixilis, the Adversary then I would probably swap Rankle out for Braids, Cabal Minion. However, Rankle speeds up the clock faster than Braids when you are ahead and I think he is a better top deck when you are behind, so I'm pretty happy with the Mardu package right now.
Suggestions rock!!! If you have any, I would love to hear them!
