Acid Arrow

A non-magical arrow with a special effect on hit. You can choose to fire this arrow while making a ranged attack roll with your bow, but only before seeing the result. Whether you hit or miss, the arrow explodes anyway.

On hit, in addition to the regular damage dealt to the target, the arrow explodes in a 5 foot cube radius (2x2 square). The target as well as any other creature caught by the arrow's radius must make a DC 12 Dexterity saving throw, taking 2d4 acid damage on a failed save, or no damage on a successful one. An arrow shot at the ground does not deal regular damage, but still explodes in a 5 foot cube radius.

Notes: Damage: Acid, Damage, Combat, Ammunition