Shapeshifter's Marrow
48cb3fa8-555f-4df6-994e-cf01896f7470
$1.00 CND
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.)