@Darro15 the Grand Prix isn't till January 10th but I will let everyone know how it went once it is done.

Nice. Well here are my 2 cents then -even though you may not change the deck before then.

The only mainboard card I'm not a huge fan of Nykthos, Shrine to Nyx. I agree with razvaniorga that it is gimmicky, and can be good, but only if you have something to ramp to. I would maybe put in either 2 Tectonic Edge or fetches. I like the fetches for triggering Bloodghast landfall an extra time. I also like the idea of Bojuka Bog in the metagame, but it may slow you down.

In the sideboard, I think 2 Duress and 2 Inquisition of Kozilek is too many. 8 discard spells seems like too much for a creature heavy deck. I really want to like Erebos, God of the Dead in there, but I don't think lifegain is something you need to hate against, so I don't know that you'll ultimately find him worth it. I also think that with Geth's Verdict and Smother there, they kinda are similar to the kill spells on your board. I'd recommend Darkblast, Drown in Sorrow or Bile Blight. I also like Vampire Hexmage in your sideboard as well. I think she just makes a lot of sense. I think some graveyard hate wouldn't be too bad as well. Surgical Extraction or Extirpate may be a good add. I also like Leyline of the Void Good luck.... Hope this helps!

Tendrils of Corruption or Mind Sludge?

Mind Sludge seems very OP even if I had 5 swamps....I love it.

Glad you like it. I have a vampire deck very similar to yours. Sign in Blood gives you some draw power if needed. But you'd be self inflicting quite a bit of damage with Thoughtseize alone.

I'll pass on the Sign in Blood. It was in this deck once before, but it got kicked out for other options. But thank you for the suggestion.

Mind Sludge is meh. By the time you get to turn 5 they'll have spent their hand for the most part. And there are better things vampires can do with 5 mana.

As it stands, I would drop your guul draz assassins and captivating vampires in favor of a fourth gatekeeper and a few more killspells.

Agreed, Mind Sludge is nada good.

Guul Draz Assassin isn't very good in aggro either.

You could free up those 3 slots and use them for a good discard spell.

Raven's Crime or Funeral Charm

If he were going to throw in more discard, I would say Inquisition of Kozilek. But I agree that guul draz assassin is meh.

Actually in this kinda decklist Funeral Charm is good for it's ability to make creatures evasive or bigger or remove something aswell as discard

Inquisition of Kozilek is in my Sideboard. I'll see if I can find 3 Charms around town this weekend. But so far I've been playing Assassin and they have gotten rid of some creatures pretty fast for me. With Nykthos, leveling them up hasn't been hard.

True - Nythkos does improve em.