Savra, Regina dei Golgari (Savra, Queen of the Golgari) (it)
Legendary Creature - Elf Shaman | Power/Toughness: 2 / 2 (CMC 4)
Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature.
Whenever you sacrifice a green creature, you may gain 2 life.