, Sacrifice a creature you control with mana value X other than Sidisi: Return target creature card with mana value X plus 1 from your graveyard to the battlefield. Activate only as a sorcery.
Sidisi turns your graveyard into an upgrade engine: sacrifice a small creature to reanimate one a mana value higher, then sacrifice that to climb to even bigger threats. You self-mill or discard fatties, deploy cheap fodder, and use the tap ability each turn to ladder up into game-ending bombs while generating death/ETB value along the way. Close games by chaining into a massive payoff that takes over the board.
Only two mana and abuses your graveyard, so it's resilient and cheap to recommit after removal.
Reanimation that dodges sorcery-speed bans on big spells—no need to cast or pay full reanimation cost.
Strong synergy with sacrifice/aristocrats payoffs and ETB/death triggers as you ladder up.
Mono-black gives access to the format's best tutors, recursion, and ramp (Cabal Coffers, dark rituals).
Ability is sorcery-speed and only reanimates one creature per turn, so it's slow against fast combo.
Needs both fodder and a stocked graveyard, making it vulnerable to graveyard hate (Rest in Peace, Bojuka Bog).
Mono-black struggles to interact with enchantments and noncreature permanents.
Relies on tapping Sidisi—summoning sickness and removal on her stall the engine.
Pays off the graveyard/life theme and helps you flood the board with fodder and threats.
Add fast mana and rituals (Dark Ritual, Cabal Coffers, Nykthos) to deploy Sidisi early and protect her with Swiftfoot Boots. Tighten the reanimation ladder with recursive fodder (Gravecrawler, Reassembling Skeleton) and high-impact targets at each mana value so every activation matters, then layer in aristocrats payoffs and tutors (Demonic/Vampiric Tutor, Entomb) to assemble a deterministic loop or combo finish.