The Raven's Warning is a rare Enchantment — Saga card from Kaldheim Promos (PKHM), collector number 227s. Current market price: — (foil $0.92), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Create a 1/1 blue Bird creature token with flying. You gain 2 life. II — Whenever one or more creatures you control with flying deal combat damage to a player this turn, look at that player's hand and draw a card. III — You may put a card you own from outside the game on top of your library.