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4 Zulaport Cutthroat
4 Grim Haruspex
4 Viscera Seer
4 Ophiomancer
4 bloodsoaked champion
4 Nantuko Husk
25 Swamp
4 Dark Prophecy
4 Altar's Reap
You have things like Skullclamp, Ashnod's Altar (and others) to take advantage of this.
Bloodghast, Nether Shadow, Ichorid, Stinkweed Imp, Vengeful Pharaoh, Ashen Ghoul, Reassembling Skeleton. There's heaps of options here really if you're running support like Buried Alive
The main problem you have is protecting yourself or mitigating the damage you're going to take. Decks like these will make you the main target.
Gray Merchant of Asphodel is an auto-include for this type of deck for me, but I like Z-cutthroat & X-necro too.
Others like Grave Pact / Dictate of Erebos, No Mercy, Fleshbag Marauder, Merciless Executioner, Innocent Blood, Massacre, Abyssal Gatekeeper are some options.
Sacrificing creatures for big mana is a good reason for stuff like Army of the Damned, Griselbrand, Rise of the Dark Realms, Exsanguinate etc. Pestilence Demon can be a soft-lock to stop opponent creature decks cold, with a Grave Pact effect.