Here's a link to a zombie pod deck that did well in a daily a little while ago that gave me the idea to make this deck http://www.mtggoldfish.com/deck/232686
With Fleshbag, Skinrender, Shriekmaw, and Massacre Wurm there's a removal creature at 3 cmc, 4 cmc, 5 and 6 cmc. Disciple of Bolas can sac a huge Nantuko Husk to draw a ton of cards and Gray Merchant of Asphodel can do a ton of damage with Phyrexian Obliterator and since the deck is mostly all black. Grave Titan is a good finisher and can make a lot of tokens for Nantuko Husk and Blood Artist shenanigans.
http://www.mtggoldfish.com/deck/232686
The idea behind it is to get Gravecrawler, Nantuko Husk, and Blood Artist out to repeatedly sac Gravecaller to gain life and do damage.
I expanded on that idea with this
1 Dryad Arbor
One CMC
4 Birds of Paradise
4 Gravecrawler
Two CMC
3 Blood Artist
3 Bloodghast
Three CMC
2 Geralf's Messenger
2 Nantuko Husk
1 Fleshbag Marauder
2 Phyrexian Obliterator
2 Skinrender
1 Disciple of Bolas
Five CMC
2 Gray Merchant of Asphodel
1 Shriekmaw
Six CMC
1 Massacre Wurm
1 Grave Titan
4 Birthing Pod
3 Abrupt Decay
Lands
4 Verdant Catacombs
4 Overgrown Tomb
4 Woodland Cemetery
8 Swamp
3 Forest
With Fleshbag, Skinrender, Shriekmaw, and Massacre Wurm there's a removal creature at 3 cmc, 4 cmc, 5 and 6 cmc. Disciple of Bolas can sac a huge Nantuko Husk to draw a ton of cards and Gray Merchant of Asphodel can do a ton of damage with Phyrexian Obliterator and since the deck is mostly all black. Grave Titan is a good finisher and can make a lot of tokens for Nantuko Husk and Blood Artist shenanigans.