Summoner's Egg

Artifact Creature - Egg 0/4, 4 (4)
Imprint - When Summoner's Egg enters the battlefield, you may exile a card from your hand face down.

When Summoner's Egg is put into a graveyard from the battlefield, turn the exiled card face up. If it's a creature card, put it onto the battlefield under your control.¹
Illus. Jim Nelson

Gatherer Card Rulings [Nov 2009]

• 12/1/2004: The card is imprinted face down. This means that other players don't know what the card is and you can't look at the card once it's imprinted (until it's turned face up, of course). Note that effects that exile cards, including all previous imprint cards, exile those cards face up unless the effect says otherwise.
• 12/1/2004: If the card is not a creature card when it's turned face up, it remains exiled face up.
• 12/1/2004: Any "When this creature is turned face up" abilities that the exiled card may have don't trigger because the card isn't being turned face up while it's on the battlefield.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/8)	Fifth Dawn (Rare)