Might of Old Krosa is a common Instant card from Double Masters 2022 (2X2), collector number 153. Current market price: $0.26 (foil $0.31), TCGplayer market prices via Scryfall.
Target creature gets +2/+2 until end of turn. If you cast this spell during your main phase, that creature gets +4/+4 until end of turn instead.