Scour from Existence is great if you want to remove any permanent BUT, you could replace it with a new card Oblivion Strike if you find yourself using it mainly on creatures anyways.

@Sweepea38: Thanks for the suggestion but Scour from Existence is mainly for artifacts, enchantments and lands (the things black has the hardest time with). Creatures have never been a problem for black lol.

Great deck! but why Polluted Mire and not Barren Moor? And... why Liliana's Shade? It looks like a sub-optimal way to get a land. Also, have you considered Liliana Vess? It's the walker-tutor :D

Dictate of Erebos for another Grave Pact.

Profane Command and Damnable Pact only let you kill one opponent at a time when you have infinite mana. Besides Exsanguinate, I suggest Death Cloud ans Torment of Hailfire for that purpose.

I would definitely think about adding vengeful dead. W Gravecrawler, phyrexian altar, and vengeful dead is infinite damage to other players.