Shadow of the Enemy

Graveyard theft has a long history in black, but most of it comes with a bill payable in black mana or a body left behind for the reanimation target. This one spends triple black to pull off something subtler: it does not put a single creature onto the battlefield. Instead it exiles a target player's whole creature graveyard and hands you a temporary library of castable spells, each one funded by mana of any type. That any-color funding is what makes the theft complete. A mono-black card that lets you spend any color to resolve what you steal quietly sidesteps black's usual weakness, since the creatures you exile may cost colors you cannot otherwise produce, and the effect refuses to let color-screw you out of your loot. The design tension it resolves is a familiar one: reanimation cheats mana but only hits one target, while a mass-theft effect that dumped everything onto the battlefield at once would be either unpriceable or trivially game-ending. By making the stolen cards castable rather than free, and gating access to their real mana costs, it turns a graveyard raid into a slower, resource-by-resource plunder. You are not resurrecting an army; you are inheriting an opponent's dead and paying full freight to use them, at your own pace, for as long as the exile persists.