When I saw Proliferate, my mind raced with possibilities. I fell in love. These days, though, proliferate is too often relegated to support for its ugly twin sister, Infect. I'm not a fan of poison counters at all, they just don't do it for me. I thought to myself, how can I get the juicy goodness of Proliferate without making another boring Infect deck? This is what I came up with:
4 x Carnifex Demon
3 x Skinrender
4 x Tatterkite
4 x Necroskitter
3 x Sickle Ripper
1 x Kulrath Knight
4 x Blowfly Infestation
2 x Contagion Engine
4 x Phyrexian Totem
2 x Throne of Geth
2 x Contagion Clasp
3 x Serrated Arrows
20 x Swamp
4 x Vault of Whispers
Basically, you want to play your creatures for the first few turns, then start spreading some -1/-1 counters on your opponent's stuff. This deck works great in either 1v1 or multiplayer, and it's a blast to play. It's really designed for creature-centric playgroups though. If your friends like to use creatureless combo or control decks, this deck becomes a pile of inefficient creatures.
There are several sick synergies in here. The silliest play this deck is capable of: drop a Contagion Engine or Carnifex Demon (with extra mana available) with a Blowfly and Necroskitter out. Most of the time, that will result in nothing less than you taking control of every creature on the board.
Double Carnifex is another combo you may be familiar with. With two on the board, they can refill each other's -1/-1 counters, resulting in unlimited activations.
As for combos with proliferate, Serrated Arrows is just awesome. You can proliferate the arrowhead counters and the -1/-1 counters simultaneously, gradually shrinking everything your opponents have.
Blowfly Infestation is a crazy card, and it's important that you know how it works. If you have a Tatterkite out, you can target it with any unwanted Blowfly triggers, even though it won't be able to get the counters. Otherwise, Carnifex Demon makes a good recipient of extra -1/-1 counters.
Since this deck clears the board so easily, Phyrexian Totem makes a good attacker. Just make sure not to use it against any red players with mana untapped.
Throne of Geth may look weaker than Contagion Clasp, but the ability to proliferate without mana can be very important. If you want to make your own version of the deck, this card gives you a very good reason to have lots of artifacts.
It's important that this deck can hit six mana in a timely manner, so I would like to fit some card draw in the above list to ensure I hit my land drops. Sign in Blood will probably go in if I can figure out what to cut. Scarscale Ritual is also kind of tempting.
Possible Card Choices
There are so many great cards that could be in here, but there just isn't enough room. Use whatever you like.
A good alternative to Carnifex Demon, or play them together. Don't overload your mana curve though.
If people like to attack you early, this might help ward them off.
Sometimes, you just have to start the party at instant speed. I wouldn't use more than two of these.
It doesn't really work well with the deck, but it's one of the better wither creatures for multiplayer.
Trigon of Corruption
Alternative to Serrated Arrows. Not quite as good in my opinion, because it costs mana to use. This deck really likes to activate lots of things in one turn.
Fantastic card. It should probably be in the list above, in fact.
A pretty solid creature with a pretty awesome bonus.
Yet another way to spread the love. It's high on the curve, but has massive immediate impact on the board. I might add one or two.
So there you have it. If you like spreading Phyrexian corruption, but aren't a fan of poison counters, this is the deck for you. Be careful of the complex stack interactions, and have a big bag of dice on hand.