Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature of their choice.
Whenever you sacrifice a green creature, you may gain 2 life.
Savra turns sacrifice into a repeatable edict that grinds opponents out of creatures while you stockpile life and value. You flood the board with expendable tokens and small creatures, then loop them through sacrifice outlets to force everyone else to lose blockers and key permanents. Win by attrition, draining the table while reanimating or recurring your own pieces faster than they recover.
Acts as a recurring board-wipe-on-a-stick, forcing edicts that hose decks relying on a single key creature
Self-sustaining life gain from green creature sacrifices offsets the life payments
Golgari excels at recursion, so your fodder keeps coming back while opponents run dry
Strong against go-tall commanders and reanimator decks that lean on one big threat
Needs a steady supply of both black AND green creatures plus a free sacrifice outlet to function
Opponents choose what they sacrifice, so they protect their best creatures and feed you chaff
Token-light or go-wide opponents shrug off edict effects
Savra herself does nothing without a sac outlet, making her a build-around that can stall if pieces are missing
Vulnerable to graveyard hate that shuts down your recursion engine