Assuming that ante cards are legal, you could try this mono - black build.
6 Tendrils of Agony
8 Duress
20 Contract from Below
24 Lotus Petal
2 Yawgmoth's Will
The numbers can vary. You could also try night's whispers but they don't seem to work quite as well as the current build. I'm sure that this is by no means optimal though. The reason that the yawgmoth's will count is only 2 is because you don't even need them to function at all, but replaying the lotus petals if you don't have enough mana to tendrils (hardly ever happens) is always cool. This deck dies to 3sphere of course, but if you go first, you should be ok. Also, if you fizzle, there are duresses to keep you safe.