standard Vampire

still working on the sideboard. any comments will be appreciated.

Your mana curve could really use some serious work. Also, I think you have far too much red mana sources for not a whole lot of red spells. Even the red spells you have are almost all single red mana, so you really do not need 12 red sources (unless you are going to add in a lot of red cards, and even then, more Swamps is better).

Sadly, there are not any good 1 or 2 drop Vampires in standard other then Stromkirk Noble (hence why Vampires has not made a huge impact on the scene). However, you could always use Vexing Devil, Fume Spitter, or Diregraf Ghoul as well. Even though they are not Zombies, they do a nice job of establishing early board presence, blocking your opponent's creatures, and getting in some early blows. Another good 2 drop is Porcelain Legionnaire. Any of those creatures would be great additions.

Blood Artist is a great card that gives you something to do on Turn 2 (something your deck really does not have right now) and it also becomes an attacker later in the game. With Vampire lords to buff him up, that small 0/1 can easily become a 3/3 First Strike, I figure. Plus the fact that you come out of top in every early game trading of creatures, he is a great pick-up for this deck.

Mutilate is not that good of a card in this deck. While it does serve a purpose as late game board control, killing off your opponent's creatures and leaving your big, beefy creatures alive, it should not be a 4 of a kind card in this deck. Because half of your lands are not Swamps, it is not a certain board killer.

Liliana of the Dark Realms is not as good as Liliana of the Veil here because you do not need the infinite mana she produces and you are not playing mono-black. LotDR is actually not that good to begin with, but if you want to use her it really needs to be a mono-black deck that has some sort of outlet for her ultimate to be used. Liliana of the Veil is pretty much good in any deck that can play her.

Vampire Nocturnus is a great card, but you always are going to run into a certain problem with him: he is not always consistent. Lands on top of your deck make your entire army super weak and cost you the game. Solution: Gitaxian Probe. Gitaxian Probe is a mana-less cycler that also gives you some information about your opponent's hand. This way, if there is a land on top of your deck, you pick it up for 2 life and hopefully you get a black card on top of your library. If not, you are one card closer to not having a land on top. This also makes your deck essentially a 56 card deck, allowing you to get the better cards that you need faster.

Victim of the Night is a bad card, especially in Standard, and Tragic Slip is better. It costs less, can kill a lot of important cards in Standard without Morbid (like Delver, Champion, Snapcaster) and can kill just about anything with Morbid. Tragic Slip is where it's at, check it out.

Brimstone Volley: super good. It's an all around good card that at it's worst is burn target player for 3 mana. It gives you more to do with your red mana, when you cast it with Morbid it's 5 damage to anything, and frankly it's another something to do while you are still getting the mana to play all your Vampires. This card is better than Murder in 90% of situations, so keep a Murder in your Sideboard and put these in your actual deck (also I think that Sever the Bloodline is better than Murder in a non-mono black deck).

So with all that said, here's what I would change:
Take out:
2x Mutilate
4x Victim of Night
4x Murder
2x Liliana of the Dark Realms
1x Vampire Nocturnus
1x Bloodline Keeper
1 more of either Bloodline Keeper or Vampire Nocturnus. I would take out the Vampire Nocturnus, but Bloodline Keeper could also be taken out if you think that would be better. You already have so many Vampire Lords, and frankly the three drop one is going to be one of your biggest assets. They are also really expensive and can weigh your hand down when you do not have enough lands. 5 expensive Vampire Lords plus Olivia should be more then enough to top out your curve.

Add in:
2x Vexing Devil
2x Diregraf Ghoul
3x Tragic Slip
2x Brimstone Volley
2x Blood Artist
2x Liliana of the Veil
4x Gitaxian Probe

Land changes:
Remove 2 Mountains
22 Lands should really be enough. This deck is kind of aggressive, and also the less lands the less likely you are to hitting lands with your Vampire Nocturnus. It also frees up more space for other, better cards. Also, even if you do not hit a Mountain on Turn 1, you can still play a Stromkirk Noble on turn 2 or 3 because there is not much else for you to do. If you can add in Blackcleave Cliffs instead of 4 Mountains, this deck would be even better, but since they are a bit of an investment and they are fading out of Standard pretty soon I don't know if it's a wise investment. If you have them, use them, otherwise just stick with 6 Mountains.

I hope that I could be helpful. Take a look at one of my decks if you get a chance but other than that good luck! ^^

I have a similar vampire deck, but I think mine runs a lot better. Like the guy ahead of me said, there are not many good one or two drop vamps in circulation right now. You have to make up for this somehow, I did so in mine with life gaining techniques. One drop still stromkirk nobles, but for two drop, child of night and blood artists are very good life gaining cards. Blood artists even bring down opponents life, and with an aggressive deck like vamps, creatures dying should be normal. Also Vampire interlopers for a 2 drop with 2 power and flying is a great addition. What the guy said ahead of me about Vampire Nocturnus, IGNORE! He made some valid points, but remember, most of a vampire deck is going to be black with only a splash of red. Lands are colourless, yes, so add in 4 evolving wilds for shuffle effects. FOUR Vampire Nocturnus's are MANDATORY in a vampire deck as they win games for you. But anyways, here's what I run:

Creatures:
4x Stromkirk Noble
4x Child of Night
4x Vampire Interloper
2x Blood Artist
4x Vampire Nighthawk
4x Stromkirk Captain
4x Vampire Nocturnus
2x Bloodline Keeper
2x Olivia Voldaren

Lands
4x Dragonskull Summit
4x Cavern of Souls
4x Blackcleave Cliffs
4x Evolving Wilds
6x Swamps
2x Mountains

Spells
4x Go for the Throat
2x Tragic Slip

The strategy with my deck is simple. Crush you opponent before he can touch you, with the help of lifelink it works a large portion of the time. Very rarely will flying via Vampire nighthawks, Bloodline Keepers, Olvia's and VAMPIRE NOCTURNUS! not give you a massive advantage. If you do find yourself at a disadvantage creature wise, it doesn't hurt to hold back your deathtouch giving Nighthawk's with first strike from Stromkirk Captains to deal with the creatures. If that's not enough... take a look at my sideboard... various spells for various situations.

Side Board
4x Dismember
4x Doomblade
4x Murder
2x tragic slip
1x Lilliana of the Veil

Different situations call for different usages from these cards. Lilliana is fun, but theres no need for her in the main deck. When someone uses the likes of Wild Guesses and Faithless Looting, however, she can be quit the pain in the ass. Obviously doom blades sub out go for the throats for artifact decks, murders for artifact/black decks (I actually came across one) and if you feel like you need more control. Tragic slips work well against morbid/birthing pod decks or decks with lots of 1 toughness creatures. Dismember works exceptionally well when dealing with lack of mana, which early in the game you should be spending almost all of your mana each turn. In addition, life link gets back the health you would pay to use them. With m13 bringing back Sign in Blood, however, I've been contemplating to throw some of them in there in place of these dismembers...

Hope this is helpful. I'm not saying the guy ahead of me had some bad ideas or anything, it's just I've played this vampire deck and it runs really well against most decks.