Acid Arrow

Evocation [water]
Tier: 2
Components: Verbal, Somatic
Casting Time: 1 major action
Range: 360 ft
Effect: One magic arrow
Duration: 1 round + 1 round
Saving Throw: None
You cast a blurred green arrow towards your foe. The bolt turns to clinging, hissing acid as it strikes him.

A magical bolt of acid springs from your hand and speeds to its target. You must succeed on a ranged touch attack to hit your target. The arrow deals 2d4 points of acid damage with no splash damage. On the next round, the acid deals an additional 2d4 points of damage unless it is somehow neutralized.

Augmentation:
For each extra spell point you invest, the acid lasts for one more round (up to a maximum total of [½ caster level] rounds).