DedWards

I understand your concern about those big boys because they're not out yet, so no one knows what type of impact they could have. But I'd like to keep Griselbrand for his draw ability that I'd only ever use after he's gained me life with his lifelink.

Oops, my bad. Thanks for pointing it out :) Typing it all out on my cell took so long I forgot the most important cards, I've fixed it now.

What would you say I should remove / reduce to put in Slagstorms?

Here's a few things you could use:
Jace's Erasure. This works well with the draw you get with Jae's Archivist or Jace, Memory Adept's +1 and -7.
Isochron Scepter. Put a Glimpse the Unthinkable on this and your opponent mite just cry :p

Grindstone + Painter Servant = opponent dead. (Normally lands are colourless, but Painter grants colour to lands too)

Nice. Fun fact for those that don't know, Surgical Extraction can target non basic lands in graveyards :p

Cool BW combo I'd like to build a deck around is Light of Day + Darkest Hour.
Another way to change colour of permanents is to play Painter Servant.

Ja, Modern's a bit weird, but after the shifts on how far back the types of tournaments go (standard = last 2 years, etc), but our group tried it as a break form our cycle of standard one week, legacy next and found it good for a break. So suggest it as a break from the norm.

That legacy build you're thinking of could cause quite a stir :p though I'd never build it as I can't afford Jittes over and above my normal Magic expenses.

Ja, Cover of Darkness and Hymn to Tourach aren't Modern legal. Anything printed before 8th Edition isn't Modern legal :(

That is an awesome card, but sadly not Modern legal :(
The closest Modern legal card I could find (at an ok mana cost) is Hideous Visage :|

Nice, I really like this :) I may build a real deck based on this :p

Got a question though. I believe it won't, but I just want to be sure. The Banneret doesn't affect Adaptive's cost, does it?

Only one Paradox Haze? You do know that they do stack?

That was actually my first idea when I got my set of Heartless Summoning, but I ended up scrapping the BW idea and I now run UB. With the UB build I once had 2 Batterskulls (copies of an opponent's with Phyrexian Metamorph) equipped to a Frost Titan :D I'm actually enjoying my UB build, it kills the control decks played in my group, but suffers against agro (I'm still trying to work on that).

Honor of the Pure and / or Adaptive Automation (it's pic looks like a soldier)

I have a white weenie deck that I use from time to time that used to run Day of Judgment, but when I tried Guardians' Pledge in its place, I started to win more games :p Guardians' Pledge is very good both offensively and defensively. I've often attacked with 3 flyers that'd normally put my opponent on 6 life left and him win in his turn only for him to die to Guardians' Pledge :) and I've 'chump blocked' and killed big threats thanks to the pledge :p

If you're going for Heartless Summoning, why's there only 2 in the deck? Also Faithless Looting seems like it'll be more harm than good in here

A few card you may want to try get:

Honor of the Pure
Adaptive Automation
Oblivion Ring
Guardian's Pledge

These are some card I would use in addition to some of what you're already using if I where to make a Griffin tribal deck.

:D

I've been saying for years that a deck doesn't need rares and the few I have in here aren't exactly needed :p

I realised a while ago that card prices ($ wise) aren't affected by rarity (much), but rather popularity. What I mean is the more popular a card is, the higher its $ value because more people will buy it. Now a lot of the cards in here aren't exactly popular, but that doesn't mean they're bad cards (as I'm sure you've noticed)

I have a habit of looking for cheap ways to make decent decks and this normally leads me to use less popular cards :p

Glad you like the deck :)

I you're insistent on adding white, try make it an Esper (WUB) control-ish deck. White opens you up to cards like Oblivion Ring, Day of Judgment and other cheap ($ wise) removal. I also had an idea, if you add white, you could use Tempered Steel to make your infectors even bigger to deter opponent's bigger creatures. Shrine of Loyal Legions can produce a lot of blockers and/or fuel for Throne of Geth. I like Tezzeret's Gambit in this idea, but don't forget its lesser 'brother'; Steady Progress (more draw and proliferate can't hurt). If you're insistent on using the Contagion Engine I suggest taking it down to a 1 of and adding 3 Contagion Clasp. The Clasp is less impressive, but more reliable because it leaves more mana open for counter spells (and other spells). Lastly, I must agree that Inkmoth Nexus, Drowned Catacomb and Glacial Fortre should be a must, but you could also use Evolving Wilds or Shimmering Grotto.

Firstly, that card didn't exist when I posted this deck.
Secondly I'd not use it because it doesn't give full control over what attacks.
Lastly I abandoned this idea as I found red messes with what I ultimately wanted to do with this deck.

Cards like Contagion Engine and Inexorable Tide, though potentially powerful cards, look like they'll slow down the deck too much to be of any use (they both have high mana costs). Additionally splashing white for one card (Venser) seems silly to me.

Now I like the idea of poison + proliferate, but don't forget you've got metlecraft in here too. This makes me ask, why not use cards like Stoic Rebuttal? I'd also suggest Mirran Mettle, but that's an off colour. Talking about pump spells, there's one player in my group runs a mono black infect deck and she runs a set of Mutagenic Growth as she can pay 2 life to cast it and give an unblocked infector +2/+2. Additionally one of the 'tricks' she uses is to kill her opponent's first turn 1/1 with Virulent Wound. This would work wonders in this deck as it kills the opponent's 1st turn creature, it also starts the poison count for all your proliferate.