this is a fun deck. now days, the modernized formats make it too slow to run 3 or 4 pox. this deck, played properly can obtain control over multiple opponents, (win or lose), and from deck searches, ive seen mono black, or b/g pox decks have consistent top 8's in their respective venues.
can also run shimian specter, and desecration demon, entomb/vengeful pharoah, helm of obedience, scroll rack, cursed scroll, nether specter, the rack, meekstone, juntu spikes, bitterblossom, bloodline keeper, extirpate (for split second), languish, the abyss, ratchet bomb, oblivion stone, curse of the cabal, trini-void for pox control, phyrexian obliterator, braids cabal minion, and other black flavorful cards. these are just off the top of my head.
currently collecting cards to build.