Essenza del Polimorfo

Incantesimo, 2UU (4)
All'inizio del mantenimento di ogni avversario, quel giocatore rivela la prima carta del suo grimorio. Se è una carta creatura, il giocatore mette la carta nel suo cimitero e l'Essenza del Polimorfo diventa una copia di quella carta. (Se lo fa, perde questa abilità.)
Illus. Chippy

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.)¹

Gatherer Card Rulings [Nov 2009]

• 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.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Visione Futura (Rare)