Creeping Crystal Coating is a uncommon Enchantment — Aura card from Avatar: The Last Airbender Eternal (TLE), collector number 136. Current market price: $0.23 (foil $0.54), TCGplayer market prices via Scryfall.
Flash Enchant creature Enchanted creature gets +0/+3 and has "Whenever this creature attacks, create a Food token." (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")