Shapeshifter's Marrow

Enchantment    (CMC:4)

At the beginning of each opponent's upkeep, that player reveals the top card of his or her library. If it's a creature card, the player puts the card into his or her graveyard and Shapeshifter's Marrow becomes a copy of that card. (If it does, it loses this ability.)

58 FUT • ENChippy

™ & © 1993—2007 Wizards of the Coast

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

Oracle Text (click to copy):

Shapeshifter's Marrow {2}{U}{U} Enchantment At the beginning of each opponent's upkeep, that player reveals the top card of his or her library. If it's a creature card, the player puts the card into his or her graveyard and Shapeshifter's Marrow becomes a copy of that card. (If it does, it loses this ability.)

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View this MTG card on Gatherer

5/1/2007
If the revealed card isn't a creature card, it stays on top of that player's library. Shapeshifter's Marrow remains an enchantment.
5/1/2007
If the revealed card is a creature card, Shapeshifter's Marrow becomes a copy of that card permanently. It's no longer an enchantment.
5/1/2007
In a Two-Headed Giant game, this ability triggers separately for each player at the start of the opposing team's turn. If the first ability to resolve reveals a creature card, Shapeshifter's Marrow becomes a creature. If the second ability to resolve also reveals a creature card, the ex-Shapeshifter's Marrow then becomes a copy of that creature.

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Card Shapeshifter's Marrow is not on TCGPlayer.