Eradicator Valkyrie is a mythic Creature — Angel Berserker card from Kaldheim (KHM), collector number 353. Current market price: $4.99 (foil $6.45), TCGplayer market prices via Scryfall.
Flying, lifelink, hexproof from planeswalkers Boast — {1}{B}, Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate only if this creature attacked this turn and only once each turn.)