Commander: Sidisi, Brood Tyrant
Theme: Zombies, self-mill and a little bit of sacrifice for value

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Need:
Lich Lord of Unx - Alternate wincon if I can't hit my opponents
Sticher Geralf - Self-mill, zombies...

Consider:
Sibsig Icebreakers/Rotting Rats - Discard outlet for madness, while also affecting opponents
Skirk Ridge Exhumer - Discard outlet and zombie generator
Stitchwing Skaab - Discard outlet and self recursion
Dread Summons - Mill and zombies
Deranged Assistant - Self-mill and ramp
Phyrexian Delver - Zombie with reanimation
Mazirek - Zombie anthem, but can I trigger it?
Evolutionary Leap - I should have enough sac fodder
Gravespawn Sovereign - Use zombies for something else
Golgari Thug - Dredge and return important creatures
Lotleth Troll - Zombie with trample and enough lords could be a good threat
Kozilek/Ulamog/Blightsteel - Try not to kill myself with self-mill