The surface of this weapon is pitted and worn.

An acidic burst weapon functions as a corrosive weapon.
In addition, the weapon automatically showers an opponent with acid upon a successful critical hit, dealing extra acid damage as set out on the table below. This acid does not harm you or any creature other than the target. This is a continuous effect and requires no activation. Even if the weapon has not been activated to deal the extra 1d6 points of acid damage that comes from the corrosive property, the weapon still deals its extra acid damage on a successful critical hit.

Critical Extra Multiplier	Acid Damage
×2	1d10
×3	2d10
×4	3d10

Projectile weapons bestow this property upon their ammunition.

Prerequisites: Craft Magic Arms and Armor, Melf’s acid arrow.
Cost to Create: 1,000 gp (plus 300 gp for base item), 80 XP, 2 days.