Oracle

Enchantment - Aura 

You may cast Grave Servitude as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
Enchanted creature gets +3/-1 and is black.

Tournooi-info

Legal in: Vintage, Legacy, Commander

Officiele rulings

10/4/2004
The color change lasts only while this card is on the creature.

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.

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