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Put target artifact or creature card from a graveyard onto the battlefield under your control. Shuffle Beacon of Unrest into its owner's library.
If the target card is an illegal target by the time Beacon of Unrest tries to resolve, the spell won't resolve. You won't shuffle it into your library.
In a multiplayer game, if a player leaves the game, all cards that player owns leave as well. If you leave the game, the permanent you control from Beacon of Unrest is exiled.
