Melf’s Acid Arrow

By means of this spell, the magic-user creates a magic "arrow" which speeds itself to its target as if fired from the bow of a fighter of the same level as the magic-user casting the spell. 

The arrow is equal to a +1 weapon for hit determination purposes. The effect of a hit might inflict damage on the target even if it would not normally be harmed by an arrow or magic weapon of only +1 value. This is due to the acid. The arrow itself does 2-5 points of damage. 

The acid which gushes forth when it hits is equal to an acid missile of 8-ounce volume (1-ft diam. area of effect, 2-8 hit points dam-age, plus item saving throw; splash does not apply). 

The acid's strength increases by one round's worth of damage for every 3 levels of experience of the spell caster above the 3rd, so that damage will occur over two rounds if the spell cast is from a 4th-6th level magic-user, unless the target can have the acid neutralized. 

The material components of the spell are a dart and powdered rhubarb leaf and adder stomach.