Mass Polymorph

Sorcery    (CMC:6)

Exile all creatures you control, then reveal cards from the top of your library until you reveal that many creature cards. Put all creature cards revealed this way onto the battlefield, then shuffle the rest of the revealed cards into your library.

64 M11 • ENChristopher Moeller

™ & © 1993—2010 Wizards of the Coast

Legal in: Modern,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Mass Polymorph {5}{U} Sorcery Exile all creatures you control, then reveal cards from the top of your library until you reveal that many creature cards. Put all creature cards revealed this way onto the battlefield, then shuffle the rest of the revealed cards into your library.

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8/15/2010
The creatures you exile with Mass Polymorph remain exiled for the rest of the game.
8/15/2010
If the number of creatures you exile is greater than the number of creature cards remaining in your library, you'll wind up revealing your entire library, putting all creature cards revealed that way onto the battlefield, then shuffling your library.
8/15/2010
All creatures you put onto the battlefield with Mass Polymorph enter the battlefield at the same time.
8/15/2010
Any abilities that trigger during the resolution of Mass Polymorph (such as a creature's enters-the-battlefield ability) will wait to be put onto the stack until Mass Polymorph finishes resolving. The player whose turn it is will put all of his or her triggered abilities on the stack in any order, then each other player in turn order will do the same. (The last ability put on the stack will be the first one that resolves.)

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