Is there a reason why you're not running Lingering Souls? It would be a nice fit in the deck.

I would substitute Vampiric Rites with Fallen Ideal. You'll find that Vampiric Rites is costly with what you want to do. Fallen Ideal returns to your hand if the creature dies, so you don't lose it. You can even protect it if someone tries to destroy it by using its ability on the creature its attached to and get it back to your hand. Also, it allows you to, essentially, trigger Blood Artist and make you creature its attached to a flying Nantuko Husk at no cost at instant speed.

Lingering Souls?

Suture Priest?

Mentor of the Meek?

Wrath of God?

Grim Haruspex?

Why not a 4 of Zulaport Cutthroat?

So many better ways of building this deck it hurts.

You know, Adrekan I appreciate helpful suggestions, but you're just being a jerk.

I definitely like the idea, but I feel as if you need some protection mainboard against combos and such. Like Thoughtseize or Inquisition of Kozilek.