Muktol

"Phyresis" can handle that problem.
I would use creatures like "Consuming Aberration" or "Mortivore" or the enchantment creature "Nighthowler" as finisher to benefit from cards being put into your opponents library. "Runechanter's Pike" would be an option if you would use self-mill ore use a ton of spells.

Greetings
Muktol

When using high toughness creatures "Phenax, God of Deception" can be a real interesting card to mill with.
I also would cut "Traumatize" and "Mind Sculpt" and use "Mind Grind" instead. The only card you have in this deck that benefits from early mill is "Jace's Phantasm". Personally I would replace the Phantasm with "Kaijin of the Vanishing Touch". It's "just" a 0/3 defender but it forces your opponent to take his attacking creature back on his hand and cast it again.

A simple card to shut down Emrakul and other graveyard based decks would be "Yixlid Jailer"

Greetings
Muktol

Some suggestions based on my own monoR goblin deck (http://www.mtgvault.com/muktol/decks/monor-tribal-goblins/)
Try to get some "Goblin Bushwhacker" instead of "Goblin Piker". Same cmc (with kicker) but gives all your creatures +1/+0 for this turn.
I would try to change from "Curse of Stalked Prey" and "Trumpet Blast" to "Quest for the Goblin Lord". Normally a single, strong, attack is all you need to beat your opponent and the Quest is better here than the Curse and it's a permanent effect unlike Trumpet.
When using Krenko I would use "Mogg War Marshal" instead of "Mogg Flunkies". Gives you 2 tokens instead of 1 creature.
"Goblin Chieftain" is expensive ($) but he's worth the money. "Hellraiser Goblin" and/ or "Fervor" could be removed out for him.
"Leyline of Punishment" belongs into the sideboard.
"Battle Hymn" won't be of great use until you get some carddraw so I would rather use "Dangerous Wager" in it's place.

Greetings
Muktol

Some suggestions based on my own monoU mill deck (http://www.mtgvault.com/muktol/decks/monou-mill-2/)
I would remove "Traumatize" because it's just to expensive for what it can do. If you want to have an alternative take a look at "Sanity Grinding"
I also would remove "Curse of the Bloody Tome" in favor of "Hedron Crab". To make full use of the crab you could also trade some of your island for some searchlands like "Terramorphic Expanse".

Some other suggestions:
"Augur of Bolas", "Archaeomancer", "Visions of Beyond"

Greetings
Muktol

Just don't mess around with werewolf's as they like decks that don't cast spells (and ninjutsu is an ability and not a cast) ;)

That's clear to me and I hope to all other players also, so I didn't point it out.
Hexproof/ shroud is a rare gift among black/ white instant spells (in fact a quick search showed that there are none) so protection spells are a good way to achive this, even if you have to take care a little bit. Indestructible as well as regeneration would be an option. The advantage of color protection is that you can protect your creatures and give them evasion with a single spell. If you use spells like "Stave Off" then it's even possible to target your opponents creatures, negating spells your opponent want's to play on them.

In my opinion it's better to loose the enchantments (save "Umbra Mystic" is on the field then you should never use those spells to protect creatures from colors they are enchanted with) than to loose the creature and enchantment. There are enough enchantments in here to re-up some, but creatures? Not so much.

"Phyresis" can be very bad news for your opponent.
Also "Tragic Slip, one of the better point removals, could be interesting for this deck, especially if you don't manage to get "Umbra Mystic" on the field.
I would throw in some protection spells, at last in the sideboard, like "Brave the Elements" (or "Skeletal Grimace" if you want an aura) to protect my creatures.

Greetings
Muktol

I think "Trinisphere" will be crucial for such decks. 3 should be enough as you want to draw it but you don't need to draw it more than once.
"Detritivore" works good against decks that run many non-basics. When going against other decks I would favor "Magnivore". Personally I would use 1-3 "Magnivore" as finisher mainboard and 1-2 "Detritivore" in the sideboard.

I mean no offence but you might want to read
http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/

Short version: Far to many cards (60 would be the optimum) and far to many different cards.

Greetings
Muktol

"Trinisphere", "Detritivore" and/ or "Magnivore" might be interesting for you.

Greetings
Muktol

Well they where a little faster (and better) before the 10th edition, when damage went over the stack. But nowadays...no they are definitely not the fastest guys, which means that one should pack enough control.

Perhaps you can take some ideas from my B/R vampire deck:
http://www.mtgvault.com/muktol/decks/rb-tribal-vampire/

Basically I would alter your creature list a little bit and add some carddraw. Some of those cards could also be put into your sideboard.
25 Land seem to be on the high side to me, I would try it with 20-22.

Greetings
Muktol

Some suggestions based on my own U/B ninja deck (http://www.mtgvault.com/muktol/decks/ub-tribal-ninjas/):
In would remove "Silent-Blade Oni" as it is the only card that ruins your modern legality.
Also "Nightveil Specter" isn't a good enabler (bring ninjas into the game with ninjutsu) because he's a little bit to expensive to play and he has no effect if you use him to bring ninjas into the game. "Tormented Soul" does the same job but costs less to play.
"Ronin Warclub" is a very interesting piece of equipment for Ninja decks as they normally lack the strength to deal real damage. You don't have to equip it because it equips itself to one of your creatures entering the battlefield...in an instant!
Spells like "Familiar's Ruse" or "Far // Away" might help you to play ninjas again with ninjutsu. Otherwise "Artful Dod" can help you to get them through to profit of their effect.

Greetings
Muktol

Some suggestions, based on my U/B standard mill deck (http://www.mtgvault.com/muktol/decks/ub-standard-mill/) and my U/B pauper mill deck (http://www.mtgvault.com/muktol/decks/ub-pauper-mill/):
Thought Scour, Pilfered Plans, Augur of Bolas, Drowner Initiate, Dream Twist

I would remove "Traumatize" because it's just to expensive (cmc) for what id can do. You could try "Increasing Confusion" as replacement
Also 24 Lands seem to be on the high side, you could try to lower the number by 2-4.

Greetings
Muktol

"Bile Blight" might be an interesting option for your sideboard.
"Read the Bones" perhaps as 2/2 split or instead of "Sign in Blood" (costs 1 mana more to play but the scry ability could increase your chance of drawing certain cards)
Otherwise it's looking good now. *like*

The deck has now a rather strong control component. When playing control I would add some more discard spells like Duress. They remove the threads from your opponents hand and prevent him from even casting them. Of course you need a little bit of card knowledge to know that to get rid of and what your opponent can keep.
24 lands seem to be on the high side so you could add some additional creatures.

What went wrong? Well take a look at the mana-curve ;).
No seriously it looks like you have tried to put 2 deck strategy's into this deck. MonoB Vampire decks normally tend to be an rather aggressive built using "Vampire Nocturnus" to buff your creatures and bypass your opponents defences. Those decks rely on aggressive creatures and cheap (cmc) removal spells.

So if you want to do a vampire sacrificing deck (which sounds like your plan when using "Kalastria Highborn" and "Blood Artist" to back him up) there are some important cards missing. But if you want to play this deck more aggressive then I would recommend lowering your mana-curve and altering your creature list a little bit.

I have done my personal revision of the Vampire Onslaught deck from WotC (http://www.mtgvault.com/muktol/decks/vampire-onslaught-revised/) and also built a B/W sacrificing deck (http://www.mtgvault.com/muktol/decks/wb-tribal-vampire-sacrifice/)

Greetings
Muktol

I would remove "Blood Tribute" as it's far to expensive for what it does, especially if you can get your hands on some "Vampire Nocturnus".
Same thing with "Necropolis Regent". If you want an additional effect like that try "Curse of Stalked Prey"
"Markov Blademaster" has too little support here (removals) to make him really effective.

Some (if not budget price included) suggestions based on my own B/R vampire deck (http://www.mtgvault.com/muktol/decks/rb-tribal-vampire/) and my mono B vampire deck (http://www.mtgvault.com/muktol/decks/vampire-onslaught-revised/)

Vampire Nighthawk (1,5$) , Vampire Nocturnus (4$), Read the Bones, Sign in Blood, Vampire Hexmage, Viscera Seer, Dismember(1$), Tragic Slip

Greetings
Muktol

I would change from "Traumatize" to either "Increasing Confusion" or "Sanity Grinding". Short version: "Traumatize" is just to expensive for what it does.
"Curse of the Bloody Tome" is a card I personally dislike in such decks (save pauper) because milling 2 cards/ round might just be to slow against many other decks. "Chronic Flooding", "Augur of Bolas" or "Mana Leak" could be interesting options.
When using "Hedron Crab" you could also use some searchlands to increase it's effect. This depends strong on your budget because I would use cards like "Flooded Strand" rather than "Terramorphic Expanse" to not slow the deck further down.

Greetings
Muktol

If this would be my deck I would do the following changes to make it a more aggro built:
Sideboard "Blood Seeker"...not every deck you will be going after will play massive creature spells. The fewer creatures your opponent plays the less effective will this card become
Remove "Sorin Markov"...simply to expensive (cmc) for what he has to offer.
Remove "Sorin's Thirst"...when playing aggro your own lifepoints are not that important.
I would remove "Adaptive Automaton" to get another "Vampire Nocturnus" instead

Suggestions:
"Bloodghast"...expensive ($) but a very good card. Especially if you add some searchlands like "Evolving Wilds"
"Vampire Hexmage"...cc2 2/1 first strike and able to kill your opponents planeswalkers by sacrificing him.
"Kalastria Highborn"/ "Viscera Seer"...if your opponent will remove your creatures you can use these guys and gain a little advantage from it.
"Dismember", "Go for the Throat", "Tragic Slip"...some low cmc removal spells
"Read the Bones"...if you need some additional carddraw

I did my personal revision of the "Vampire Onslaught" theme deck from WotC. Maybe you can also take some ideas from there:
http://www.mtgvault.com/muktol/decks/vampire-onslaught-revised/

Greetings
Muktol