Sphinx Ambassador is a mythic Creature — Sphinx card from Magic 2010 (M10), collector number 73. Current market price: $50.51 (foil $100.60), TCGplayer market prices via Scryfall.
Flying Whenever this creature deals combat damage to a player, search that player's library for a card, then that player chooses a card name. If you searched for a creature card that doesn't have that name, you may put it onto the battlefield under your control. Then that player shuffles.