Thieves' Fortune is a uncommon Kindred Instant — Rogue card from Morningtide (MOR), collector number 54. Current market price: $0.26 (foil $3.47), TCGplayer market prices via Scryfall.
Prowl {U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.) Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.