redhead4 Im a fan of your using Arguel's Blood Fast. I thought of throwing it in my deck too. In my opinion I think your deck might work more smoothly with less four drops. If you really like Bloodline Keeper then Id recommend removing Vampire Nocturnus since he requires 3B which can be hit or miss in decks with more than one color. Instead youd probably find a lot of success with putting in Blood Artist since youll be dishing out way more tokens than my deck would. Also, Vault of the Archangel is dope and its going in my deck. However, I think maybe you have too many non basic lands. Maybe removing Nythkos, or one of the dual lands and putting in some plains/swamps will help. These are just ideas, not sure if theyll work, but might be worth a shot.

nlidmasterThank you for your help! I tried putting Blood Artist for the drain several times, but all the good creatures for the deck have a pretty good black devotion rate, so i took one nocturnus and all the high-B-required cards in purpose, for being able to pay several Kalastria Highborn triggers with the Nykthos. That makes her actually better than the Blood Artist and solves a little bit the curve problem that almost all Vampire decks have (maybe not the BR). I tried it and by all means 3 Nykthos are too much, so you're right XD. But I'd leave 2 in there, because of what I said.

This Deck is still on progress, it's still a prototype, so your comment is helping me a lot! I'll have to test it against other modern decks to see what it's lacking. The problem of the 4-drops is true, but Captivating Vampire seems just not as good as Bloodline Keeper... Maybe I'll put Queen's Commission instead of Call to the Feast, taking in consideration the x3 Anointed Procession.

I'll check it and I'll let you know. I'll insist in the deck, because I love Orzhov and I love Vampires, so... I won't surrender till I see this work.

Thanks a lot again!