Nadu, Winged Wisdom is a rare Legendary Creature — Bird Wizard card from Modern Horizons 3 Promos (PMH3), collector number 193s. Current market price: — (foil $2.45), TCGplayer market prices via Scryfall.
Flying Creatures you control have "Whenever this creature becomes the target of a spell or ability, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. This ability triggers only twice each turn."