Gamekeeper is a uncommon Creature — Elf card from Commander 2016 (C16), collector number 151. Current market price: $0.26, TCGplayer market prices via Scryfall.
When this creature dies, 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.