Did you get this off the Daily MTG page on the Magic Site? I just read about this :P
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For a deck that seems to play off a graveyard, there aren't many fodder creatues
i play vampires a lot but this really makes my jaw drop.my only concern would be your early game creatures
you need 60 cards for a tourney legal deck. i'd reccomend some low mana unblockables or a Pulse Tracker. Pulse Trackers are 1 mana and deal damage even if you use a ninjutsu ability
ur gonna get raped without any creatures
endemic plague plus any 1 changeling XD. wipe the board then use any mana left over for more guys. i would suggest some more deck searchers and quick artifacts. then add some higher power cards.