Tokens! Wonderful tokens. Mmm, yes.
Anointed Procession makes this an excellent token-pooping Modern adventure with double the token output (more so if you have more than one on the field). With Sorin, Lord of Innistrad, Legion's Landing , Mavren Fein, Dusk Apostle and Queen's Commission/Call to the Feast, you'll have an ample supply of meat shields (er, 1/1's). Intangible Virtue adds to the token swarm by giving them an additional +1/+1 and Vigilance.
Bloodline Keeper makes this an absolute staple by not only adding 2/2 WITH Flying to the field every single turn, but if you manage to transform him (easy peasy with 1/1 & 2/2 tokens), all your other Vamps on the field get +2/+2. Did I mention they stack? They stack. Make those tokens beefy.
Removal sorceries and instants? It's big in Modern or something. Path to Exile (duh) and Fatal Push (bigger, longer duh) and Lightning Bolt keep those other creatures off your back for a while so you can build your ant hill of Vampires.
A crash course in the rest of the deck:
Stromkirk Captain = Helps beef up those 1/1 and 2/2 weenies in addition to giving them First Strike, which is lovely.
Olivia Voldaren = She can tear through your opponent's ramp creatures, continues to get more powerful every turn w/ +1/+1 (assuming you keep her alive) and once you've acquired a plethora of lands and gave at least one of your opponent's creatures Vampirism with her snazzy ability, you take control of that creature. Nice, right? Right.
Blood Baron of Vizkopa 4/4 with Lifelink and protection from White AND Black. Did I mention it becomes a 10/10 with Flying if certain conditions are met? Tasty.
Enjoy sucking blood and shitting bats! :)