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 Shapeshifter's Marrow becomes a copy of that card. (If it does, it loses this ability.)
![Shapeshifter's Marrow [Future Sight] MTG Single Magic: The Gathering | Multizone: Comics And Games](http://multizone.ca/cdn/shop/products/48cb3fa8-555f-4df6-994e-cf01896f7470.jpg?v=1702946092)
