Grave Servitude | Magic: The Gathering
Formats Grave Servitude is Legal in
Official Oracle Text for Grave Servitude
Enchanted creature gets +3/-1 and is black.
Official Rulings for Grave Servitude
10/1/2009 : The sacrifice occurs only if you cast it using its own ability. If you cast it using some other effect (for instance, if it gained flash from Vedalken Orrery), then it won't be sacrificed.