When We Were Young is a uncommon Instant card from Kamigawa: Neon Dynasty (NEO), collector number 43. Current market price: $0.15 (foil $0.05), TCGplayer market prices via Scryfall.
Up to two target creatures each get +2/+2 until end of turn. If you control an artifact and an enchantment, those creatures also gain lifelink until end of turn.