Gamekeeper

Creature - Elf 2/2, 3G (4)
When Gamekeeper is put into a graveyard from the battlefield, you may exile it. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and put all other cards revealed this way into your graveyard.¹
Illus. Scott Hampton

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: If you have no creature cards in your library, all the cards from your library end up in your graveyard and you do not get to put a creature onto the battlefield.
• 10/4/2004: Exiling this card is optional. If you forget to do so, you can't go back later and do so, even if that is what you normally do.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Urza's Destiny (Uncommon)