Ethereal Valkyrie is a rare Creature — Spirit Angel card from Kaldheim Commander (KHC), collector number 16. Current market price: $0.49, TCGplayer market prices via Scryfall.
Flying Whenever this creature enters or attacks, draw a card, then exile a card from your hand face down. It becomes foretold. Its foretell cost is its mana cost reduced by {2}. (On a later turn, you may cast it for its foretell cost, even if this creature has left the battlefield.)