Nylea's Intervention is a rare Sorcery card from Theros Beyond Death Promos (PTHB), collector number 188s. Current market price: — (foil $2.25), TCGplayer market prices via Scryfall.
Choose one — • Search your library for up to X land cards, reveal them, put them into your hand, then shuffle. • Nylea's Intervention deals twice X damage to each creature with flying.