Mana base:
14 Swamp
4 Mishra's Factory
2 Unholy Grotto

Creatures:
4 Carnophage
4 Carrion Feeder
4 Phyrexian Negator
4 Dark Confidant
3 Hypnotic Specter
2 Withered Wretch

Other spells:
4 Dark Ritual
4 Aether Vial
4 Contamination
4 Oversold Cemetery
3 Jitte

Sideboard:
4 Duress
3 Perish
2 Withered Wretch
2 Attrition
2 Virtue's Ruin
2 Phyrexian Reclaimation
I built the deck because I wanted a mono black aggro deck that had a consistant win ratio and good mana base.

Vial cheat's my creatures into play.
Dark Ritual gets me turn 1 Hyppie, or Negator.
Negator is good maindeck in my non red meta.
Jitte makes up for life lost.
Contamination locks my opponent's mana while I beat them down with fast creatures.
Oversold Cemetery keeps the Contamination lock down, but they are both good by themselves.
Mishra's Factory is aslo amazing with contamination
Dark Confidant, drawing 2 cards a turn FTW
Carnophage and Carrion Feeder are neccesary and efficient 1 drops.
Hypnotic Specter: always good in black aggro
Withered Wretch improves the Gro matchup

Matchups:
Haven't had that much time to test all of my matchups, but with the games I have played, it looks promising. I am hoping to get some feedback on this, and maybe some more testing on MWS.
AoD