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Ichorid .dec

Ichorid.dec (or simply Ichorid, or Frigorid) abuses the Dredge mechanic with high-Dredge creatures and lots of draw. It works by dumping your entire library into the grave, then using Ichorid s to smash lots of face over and over again. Supporting roles like Psychatog give you extra win conditions, as well as a Wonder to give your win condition of choice wings. Frigorid has become quite a cornerstone in the Ravinca block metagame, and there are reasons why. It's quick. Frigorid is probably one of the fastest aggro decks in existence, and can readily destroy control and combo alike. Moving on...

// Mana
1 Riftstone Portal
1 Swamp
1 Island
1 Overgrown Tomb
4 Watery Grave
4 Cephalid Coliseum
3 Polluted Delta
2 Bloodstained Mire
3 Chrome Mox

// Engine
4 Careful Study
4 Zombie Infestation
3 Deep Analysis
3 Tolarian Winds
1 Golgari Thug
4 Stinkweed Imp
4 Golgari Grave-Troll
4 Putrid Imp
4 Psychatog
4 Ichorid
1 Wonder

// Crap
4 Cabal Therapy

Riftstone Portal- Played soley for SB Ray of Revelation, which is always a good idea (to counter the popularity and relative difficulty of CAL).

Bascis/Tomb/Grave- The basics are the only non-pain causing lands in the deck. The shocklands are great, fetchable lands that fix the base very well.

Cephalid Coliseum- Threshold isn't very difficult to achieve in this deck, as such Cephalid Coliseum is the perfect choice. The threshold ability can let you Dredge huge amounts into your graveyard, and the discard lets you get rid of any unwanted fat in your hand.

Fetchlands- Pretty obvious, fetches the shocklands.

Mox- lets you do some crazy stuff turns two and three, allows for a first turn Zombie Infestation, which is definite a solid secondary win condition.

Careful Study- Decent draw power for a one cc spell (only topped by Cephalid Coliseum), and definitely a cost efficient one. Can net a big Dredge, and lets you finish with just as much Dredge targets in the grave as when you started. Also gives you a good quick discard outlet first turn without casting Imp/Tog.

Zombie Infestation- Gives you another win condition, basically. An incredibly powerful discard engine, giving you flying (Wonder in the grave) 2/2 Zombie tokens to smash face (or to sac to Therapy flashback). First turn Infestation is quite a powerful play.

Deep Analysis- Usually, you won't be hardcasting this (thankfully). DA is solid card advantage that (assuming the Flashback cost) is extremely cost efficient. The three life hurts (in conjunction with all the pain/shocklands), but is entirely worth it.

Tolarian Winds- A great card in the first two or three turns, but after that becomes almost dead. Winds is a great play when you've got a bunch of Dredge stuff in your hand, but otherwise can severely hurt. Not bad, but a far cry from game-ending.

Golgari Thug/Stinkweed Imp/Grave-Troll- High Dredge costs = the life of this deck.

Tog/Imp- Both are discard outlets, with Tog being the far superior one. Tog gives you yet another win condition (with Wonder), considering you can Dredge your whole library and then remove them all from the game (typically nets at least a 18/18), not to mention any excess in your hand. Imp is turn one discard, 'nuff said.

Ichorid- Recurs, smashes face, dies. Rinse and repeat as necessary. Beats face and flies with Wonder.

Wonder- Makes your little freak show fly into your opponents face.

Thearpy- In a clutch it's a discard outlet for you-but normally, you can get rid of troublesome Deeds or grave hate . Synergistic with Ichorid/zombie tokens (from Infestation).

Sideboarding
When sideboaring for Frigorid, you must keep one thing in mind-the cards you sideboard in cannot slow the deck down at all. One of this deck's defining features is it's aggression-if it slows down for even a turn, you could easily lose the upper hand. Ichorid needs to gain the lead and keep it-for good. Of course, with this in mind, one of the greatest anti-Ichorid tools ever is Leyline of the Void . A game starting with this in play is bad. Very bad. Ways around it include playing a Godless Shrine and splashing white for Vindicate or any assortment of enchantment hate. The rest of the sideboard is up to you-I don't know your metagame.
Popular answers to various situations include Darkblast , Duress , Coffin Purge (vs. mirror match), and Ray of Revelation (vs. CAL).