Pia, Aether Ascetic is a uncommon Legendary Creature — Human Druid card from Reality Fracture (FRA), collector number 264. Current market price: $0.75 (foil $2.84), TCGplayer market prices via Scryfall.
When Pia enters, you may discard a card. If you do, search your library for an enchantment card, reveal it, put it into your hand, then shuffle.