Legendary Creature â Elder Dragon
Whenever Vaevictis Asmadi, the Dire attacks, for each player, choose target permanent that player controls. Those players sacrifice those permanents. Each player who sacrificed a permanent this way reveals the top card of their library, then puts it onto the battlefield if it's a permanent card.
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You must target one of your permanents to sacrifice as well.
Vaevictisâ€™s triggered ability resolves during the declare attackers step, before blockers are chosen. A creature targeted by its ability wonâ€™t be around to block, and creatures put onto the battlefield with its ability may be able to do so.
If any player controls no permanents, Vaevictisâ€™s ability wonâ€™t have sufficient legal targets, so itâ€™s removed from the stack without any effect.
If any of the target permanents arenâ€™t sacrificed (most likely because one of them became an illegal target, such as by gaining hexproof), that permanentâ€™s controller wonâ€™t reveal the top card of their library or put it onto the battlefield.
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