Battle of Frost and Fire is a rare Enchantment — Saga card from Kaldheim Promos (PKHM), collector number 204s. Current market price: — (foil $0.63), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — This Saga deals 4 damage to each non-Giant creature and each planeswalker. II — Scry 3. III — Whenever you cast a spell with mana value 5 or greater this turn, draw two cards, then discard a card.