Eradicator Valkyrie is a mythic Creature — Angel Berserker card from Kaldheim Promos (PKHM), collector number 94p. Current market price: $2.17 (foil $5.02), 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.)