Sauron, the Necromancer {3}{B}{B}
Legendary Creature — Avatar Horror
Menace
Whenever Sauron attacks, exile target creature card from your graveyard. Create a tapped and attacking token that's a copy of that card, except it's a 3/3 black Wraith with menace. At the beginning of the next end step, exile that token unless Sauron is your Ring-bearer.
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Cards that do something similar expected a card that isn't here?
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