Sidisi's Non-Deterministic Zombie Horde (EDH / Commander)

Sidisi deck focused on a combo with Undead Alchemist + Altar of the Brood, a silly non-deterministic combo that is meta-dependent. If you are in a creature heavy (and OG Eldrazi Titan-less) meta, then this combo will usually result in decking your opponents. If Syr Konrad, the Grim is on the field when the combo begins, then you can usually kill your opponents with damage. Having Altar of Dementia in play can help.

As a backup, I run the Mesmeric Orb + Kiora's Follower + Fatestitcher (or any two creatures that can tap to untap a permanent). This combo allows you to mill your entire library until you hit Kozilek, Butcher of Truth, which then shuffles everything back. With Sidisi on the battlefield, that creates infinite zombies. From there, the primary line is to sacrifice 2 zombies to flashback Dread Return and reanimate Syr Konrad, the Grim/Body Double as a copy of Syr Konrad. Then, you keep milling and Konrad kills your opponents. If that somehow fails, hopefully you can pull Craterhoof Behemoth from your graveyard and then swing Fatestitcher, Craterhoof Behemoth, and 1 more creature at your opponents for the kill.

Other fun combos include Kederekt Leviathan + Animate Dead/Dimir Doppelganger/Clever Impersonator for repeatable board resets. Because that is the definition of fun.

3/31/20: Dumped original list online and realized I was 7 cards under 100. Also realized I was light on removal, and had moved away from the original aristocrat strategy. Identified 12 cards that could easily be dropped.

4/1/20: Resolved a Grimgrin, Corpse-Born for the first time. I was pleasantly surprised at how quickly the game became "remove that zombie before he blows up my commander", which was pretty fun. He's staying in the deck. I have also decided to abandon the Lab Man/Oracle combo entirely because it's preventing me from running a Titan to win. Revisited lands.

5/2/20: Flash is banned, so I'm considering if Protean Hulk would be fun once its price comes down. I wonder if there is a way using Trinket Mage or Tribune Mage as well as Dimir Doppelganger to net enough triggers of Hulk and assemble the non-deterministic combo.

7/29/20: Mesmeric Orb reprint incoming. Time to polish the list and take the plunge. Should I include Crashing Drawbridge to provide haste for infinite zombies?

8/3/20: Polishing is done, I pushed for a lower CMC and added a few key cards like Basalt Monolith, Mindcrank, Street Wraith, and others which I have already forgotten. I also streamlined the win, removing some of the cards with "{T}: Untap target creature" as these were useless on their own. In their stead I am running Clever Impersonator which can double as Kiora's Follower or an unearthed Fatestitcher in a real pinch. Also, I realized reanimating Syr Konrad, the Grim instead of Craterhoof Behemoth provides a much cleaner win--this is now the primary line for the "backup" combo. Craterhoof is staying in the deck because reanimating it does lead to sudden (if a bit telegraphed) kills.

9/4/20: Dropped Basalt Monolith, as it made the "backup" line with Mesmeric Orb strictly better than the "main" combo. Swapped in Preordain to make early game easier. Made the purchase. Will report back with how well it works.