Scarring Memories is a uncommon Sorcery — Lesson card from Avatar: The Last Airbender Eternal (TLE), collector number 111. Current market price: $0.26 (foil $3.48), TCGplayer market prices via Scryfall.
You may cast this spell as though it had flash if you control an attacking legendary creature. Target opponent sacrifices a creature of their choice, discards a card, and loses 3 life.