Bitterblossom is a mythic Kindred Enchantment — Faerie card from Ultimate Box Topper (PUMA), collector number U7. Current market price: — (foil $45.86), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.