Isperia the Inscrutable is a rare Legendary Creature — Sphinx card from Dissension (DIS), collector number 114. Current market price: $0.37 (foil $21.86), TCGplayer market prices via Scryfall.
Flying Whenever Isperia deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.