Season of Loss is a mythic Sorcery card from Bloomburrow Promos (PBLB), collector number 112p. Current market price: $3.15 (foil $3.66), TCGplayer market prices via Scryfall.
Choose up to five {P} worth of modes. You may choose the same mode more than once. {P} — Each player sacrifices a creature of their choice. {P}{P} — Draw a card for each creature that died under your control this turn. {P}{P}{P} — Each opponent loses X life, where X is the number of creature cards in your graveyard.