Kami's Flare is a common Instant card from Kamigawa: Neon Dynasty (NEO), collector number 150. Current market price: $0.15 (foil $0.12), TCGplayer market prices via Scryfall.
Kami's Flare deals 3 damage to target creature or planeswalker. Kami's Flare also deals 2 damage to that permanent's controller if you control a modified creature. (Equipment, Auras you control, and counters are modifications.)