多相の戦士の真髄 (Shapeshifter's Marrow)

Card Rules and Details

Card Type: Enchantment

Mana Cost: {2}{U}{U}

Oracle Rules Text: At the beginning of each opponent's upkeep, that player reveals the top card of their library. If it's a creature card, the player puts the card into their graveyard and this enchantment becomes a copy of that card. (If it does, it loses this ability.)

Set: Future Sight (#58), Rarity: Rare, Artist: Chippy