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I guess you would call this a dredge deck or something like a "self mill". The idea is to keep milling your own library and get all kinds of different benefits from it, the most obvious one being Sidisi, Brood Tyrant. Since the most important card type in a Sidisi deck is "Creature", I've tried to maximize the amount of creatures to improve my chances of getting a zombie with each mill effects. The other cards caring about Card Type X going to the graveyard are Turntimber Sower and The Gitrog Monster.

Because of the the way Sidisi is worded, a lot of small mill effects are of course more desirable than let's say something like Traumatize. I've included the rough calculations of my odds of hitting with each kind of mill effect. The actual numbers in game are of course dependent on what has been drawn so far.

Mill 1
Cards: Deranged Assistant, Millikin, Embalmer's Tools, Mesmeric Orb
Chance to hit a Land card ~38%
Chance to hit a Creature card ~44%

Mill 2
Cards: Dakmor Salvage, The Mending of Dominaria, Nyx Weaver, Extractor Demon, Splinterfright
Land ~62%
Creature ~69%

Mill 3
Cards: Life from the Loam, Hedron Crab, World Shaper, Sidisi, Brood Tyrant
Land ~76%
Creature ~82%

Mill 4
Cards: Gisa and Geralf, Golgari Thug
Land ~85%
Creature ~90%

Mill 5
Cards: Geralf's Mindcrusher, Stinkweed Imp
Land ~91%
Creature ~95%

Other mill effects
Golgari Grave-Troll, Phenax, God of Deception, Altar of Dementia, Jace, Memory Adept

Now, couple of words to people who are here looking for ideas and are thinking about building a Sidisi deck of their own: this style of deck is extremely non-interactive. It can often feel like playing solitaire. If you are doing this with physical cards, you'll also be struggling with trying to fit your graveyard on the battlefield. From what I've gathered from my opponents' reactions is that it is cool "once in a while" sort of deck, but they'd definitely not want to play against it for too many consecutive games.

The deck is actually surprisingly resilient to graveyard hate, while being almost completely immune to stuff that prevent graveyard targeting (Ground Seal etc) since that ain't really what you are going for. It is usually fine with the graveyard getting exiled couple of times since the high density of mill effects ensures that you can pretty easily get going again. If they keep forcing you to refill your 'yard over and over again though, you'll quickly run into the very real risk of decking yourself.

Having played this deck for many years now, I'd say the most common methods for ending the game are:
1) Just creature beats. The deck generates pretty nice amounts of tokens and it does so pretty fast.
2) Laboratory Maniac. I first included it as kind of a joke, but since it's pretty darn easy for the deck to just empty out it's library and reanimate the Maniac with Dread Return, I have certainly resorted to it more than a few times.
3) Some sort of lockdown with Possessed Portal or Mist of Stagnation.
4) Mill your opponents! Phenax, God of Deception and Altar of Dementia play the key role here. This should only be done against some sort of Fog decks or against Moat effects but I have done it a few times.

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Comments

94% Casual

Competitive

Date added 9 years
Last updated 8 months
Legality

This deck is Commander / EDH legal.

Rarity (main - side)

10 - 0 Mythic Rares

53 - 0 Rares

24 - 0 Uncommons

8 - 0 Commons

Cards 100
Avg. CMC 3.42
Tokens Incubator, The Initiative, Treasure, Worm 1/1 BG, Zombie 2/2 B
Folders Commander
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