Savra, Queen of the Golgari | Magic: The Gathering
Formats Savra, Queen of the Golgari is Legal in
Official Oracle Text for Savra, Queen of the Golgari
Whenever you sacrifice a green creature, you may gain 2 life.
Official Rulings for Savra, Queen of the Golgari
10/1/2005 : Savra itself doesn't let you sacrifice creatures, and you can't sacrifice them spontaneously. You must have another spell or ability that lets you sacrifice creatures.
10/1/2005 : Sacrificing a creature that's both black and green will make both abilities trigger. You may put them on the stack in whichever order you want.