name: Game Preserve
originalText: At the beginning of your upkeep, each player reveals the top card of his or her library. If all cards revealed this way are creature cards, put those cards into play under their owners' control. (Otherwise, put them back face-down on top of their owners' libraries.)
printings: MMQ
text: At the beginning of your upkeep, each player reveals the top card of their library. If all cards revealed this way are creature cards, put those cards onto the battlefield under their owners' control.