Unleash the Inferno is a rare Instant card from Streets of New Capenna Promos (PSNC), collector number 229p. Current market price: $0.25 (foil $0.39), TCGplayer market prices via Scryfall.
Unleash the Inferno deals 7 damage to target creature or planeswalker. When it deals excess damage this way, destroy target artifact or enchantment an opponent controls with mana value less than or equal to that amount of excess damage.