Corrosive Shot

You infuse a piece of ammunition with corrosive acid and fire it at a creature within range. Make a ranged weapon attack with the infused ammunition. On a hit, the target takes the weapon’s normal damage, and the acid weakens its defenses. Until the start of your next turn, the target’s armor class is reduced by 1 due to the corrosive acid.

This spell’s damage increases when you reach certain levels. At 5th level, the weapon attack deals an extra 1d6 acid damage, and the target’s AC is reduced by 2. The acid damage increases by 1d6 at 11th level (2d6) and 17th level (3d6). The AC reduction remains at 2.