-1/-1counters... Black

[lejhy]

-1/-1counters... Black 60 cards, 0 sideboard 20 {Swamp} 20 lands 2 {Demonlord of Ashmouth} 4 {Fume Spitter} 3 {Soul Snuffers} 4 {Necropede} 4 {Necroskitter} 3 {Kulrath Knight} 2 {Deity of Scars} 1 {Midnight Banshee} 23 creatures 4 {Terror} 2 {Crumbling Ashes} 4 {Dark Ritual} 4 {Blowfly Infestation} 3 {Scar} 17 other spells Sideboard

[LinkCelestrial]

I'd run more land. (Around 24) I also wouldn't run {Necropede}, infect is not your best bet with the other cards you've got. 

{Corrosive Mentor} would be pure gold in this deck.

{Contagion Clasp}. Proliferate is a must.

{Contagion Engine}. Nothing proliferates like this beast.

All in all looks like a fun deck that can make a serious mess.

[Munchlax]

{Black Sun Zenith} and {QuillSpike}

[Denzark]

[c]Carnifex Demon[/c] might also work here

[Natxoblogg]

{Festering Goblin} but i think that you need cards acceleratons how  {Phyrexian Arena} or  {Sign in Blood}

[Swamplord99]

Good deck tho