Flying Players can't lose the game or win the game. At the beginning of your upkeep, if each player has an empty library, sacrifice Platinum Persecutor and you win the game.
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Platinum Persecutor
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Artifact Creature — Angel Demon
Flying Players can't lose the game or win the game. At the beginning of your upkeep, if each player has an empty library, sacrifice Platinum Persecutor and you win the game.