Bloodsoaked Altar is a uncommon Artifact card from Core Set 2020 (M20), collector number 90. Current market price: $0.25 (foil $0.28), TCGplayer market prices via Scryfall.
{T}, Pay 2 life, Discard a card, Sacrifice a creature: Create a 5/5 black Demon creature token with flying. Activate only as a sorcery.