Corrosive Arrow

You draw the bow used in the spell's casting and make a ranged attack with it against a target you can see within the weapon's range. Acid envelops your arrow as you draw back the string. On a hit, the attack deals an extra 1d6 acid damage. Additionally, the target becomes corroded until the end of your next turn. A creature immune to acid damage cannot be corroded.

While corroded, the creature has disadvantage on Charisma saving throws, and its Armor Class is temporarily reduced by 1 point. If the creature takes either additional acid or cold damage before the condition ends, the corrosive acid lingers for longer, causing the temporary Armor Class reduction to become a permanent reduction.

Alternatively, if the creature takes fire damage before the condition ends, the acid ignites and deals 1d10 fire damage to the target.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 1.