Fortune Thief is a rare Creature — Human Rogue card from Time Spiral (TSP), collector number 156. Current market price: $0.67 (foil $4.50), TCGplayer market prices via Scryfall.
Damage that would reduce your life total to less than 1 reduces it to 1 instead. Morph {R}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)