Things you might want to add:
Necromancy , Buried Alive , Sadistic Hypnotist , Vampire Nighthawk , Pelakka Wurm , Thragtusk , Mind Slash , Stitch Together , Phyrexian Delver , Rancor , Cultivate , Sakura-Tribe Elder , Farseek , Golgari Signet , Golgari Charm , Krosan Grip , Tempt with Immortality , Sepulchral Primordial , Reincarnation , Bane of Progress , Elderscale Wurm , Engulfing Slagwurm , Gaea's Revenge , Hydra Omnivore ... and more!
Things you might want to remove:
Deadly Recluse , Satyr Wayfinder , Maalfeld Twins , Kheru Dreadmaw , Jade Mage , Devouring Swarm , Carnage Wurm , Nature's Spiral , Lead the Stampede , Kin-Tree Invocation , Disentomb , Bitter Revelation , Howl from Beyond , Doom Blade ... and more!
Urborg, Tomb of Yawgmoth + Spreading Algae is a wonderful land destruction combo. Then you have War's Toll that works well with Spreading Algae and Blight . Finally Stoneshaker Shaman makes this combo even more brutal by forcing them to destroy the lands they don't want to tap.
I also think you are missing a lot of the other land destructions. I'm just going to suggest everything regardless of budget. Pox , Smallpox , Molten Rain , Tectonic Edge , Wasteland , Ghost Quarter , Boil , Tsunami , Flashfires and Fulminator Mage . After that you have the pseudo destruction of Blood Moon , Convincing Mirage , Spreading Seas , Mana Breach , Overburden and Choke .
Then you've got the oh so wonderful Crucible of Worlds and Azusa, Lost but Seeking combo which works wonders with the lands that destroy lands and with Pox and Smallpox . You can also consider Nature's Spiral .
Seems very black-heavy right now. I notice in your recent update you took out both Hedron Crab , and Paranoid Delusions both of which I would consider strong cards in the deck. I know you are looking at this as an opportunity for a Zombie tribal deck, but at the end of the day Grimgrin, Corpse-Born decks are always going to be strongest for that. I've lost to them enough to know. What I see with Sidisi is a really strong opportunity to take all the self-mill mechanics (Dredge, Scavenge, and now Delve) and put them in a single solid deck. If you run some things like Nature's Spiral and Treasured Find to get back things you might lose; Diabolic Tutor , Jarad's Orders , and other tutors to get key pieces; and maybe things like Elixir of Immortality for reset options, and you're able to cycle through your deck and graveyard pretty effectively, which will just spawn zombies all the while. I'd keep some zombie tribal cards in there to boost your tokens, but getting overly fixated on it probably isn't your best option.
kamarupa yes, the combo relies on Deathrender , but for this reason I have an aggro deck with undying to survive and I can use Nature's Spiral to bring Deathrender or any strong creature back to me. Unless it, I have 1-3 drops only, what I think is ok to support the game even without the combo (Rancor + undying is a good combo too).
I'd say your Avg. CMC is too high. Replace eight 4+ CMC cards with 1-2 CMC cards. If you're sacrificing a lot, then something that interacts with your Graveyard is going to add a dynamic to your game. You might consider some thing like Mending Touch or Nature's Spiral . Diabolic Servitude also comes to mind. There's a lot of others, just depends on what you'd like to add using all those cards going in the Graveyard.
Removal could pose some threats to your win. You might consider sideboarding a some of these:
An alternative to those would be Alpha Authority .
Personally, I really like using Proliferate as an added win-con. Contagion Clasp or Thrummingbird are affordable options in both cost and CMC. I run Contagion Engine in my Infect deck, but it's meant to run a lot slower than this.
|0.03 TIX||0.04 TIX|
|Avg. draft pick||7.71|
|Avg. cube pick||11.57|
|Commander / EDH||Legal|
|2011 Core Set||Uncommon|
|2010 Core Set||Uncommon|