Nianque

4 Thrumming Birds would help you I think.

Try taking out a plains and putting in 4 plague myr.

Get some more propagators into this, they're lethal with infinite mana galvanizers. You should also get a few myr battlespheres.

Haunting Echoes and... what ever the one is that lets you exile 5 or 15 cards.

Leyline of Anticipation if you would like to prevent them from drawing.

I'm not sure how you can not have Glissa or Skithiryx... Those two make infect. Also, I would take out a forest and 2 or 3 islands. And while you're at it, I would get Ichor rats or more corpse curs in there.

Take out some red land, you have a 43 to 12 ratio black to red. Squeeze in a few captivating vampire while you are at it.

This deck is too spread out and useless early game. You need to put in some ways to stall if you want this to work.

You've won tournaments with it? What kinds? I can't think of a type that this is legal in.

I recommend looking at my Gideon deck as it has several ways to proliferate and several ways to stall.
http://www.mtgvault.com/ViewDeck.aspx?DeckID=146165

I recommend more ways to proliferate, more alternative wins, and something to counter naturalize spells.

Pretty good... I don't think you have enough ways to get wolves out onto the field though. Take a look at mine, http://www.mtgvault.com/ViewDeck.aspx?DeckID=145130 it has a lot of good wolf producing cards in it.

I'm still not sure you have enough creatures to reliably get Demon of Death's Gate out... but I don't know what you would take out.

Have you thought about adding some kind of mana ramp to get this to work faster?

We should petition Wizards to give us more good rats.

I recommend taking out Nissa and Nissa's Chosens, while they give you good blockers that keep coming back you don't really have enough elves to make them shine. You might also consider Accorder's Shield. A 0 drop that gives +0/3 and vigilance for an equip cost of 3 is pretty good.

Could you take a look at my Wolf deck and tell me what you think?

Almost reminds me of my wolf deck! Actually it looks like my elf deck and my wolf deck had a child and this is it.

Love the concept.

You need to put Leyline of Anticipation in here! That way you can discard before they can even play cards...

This deck is evil! I may have to try this.