Speeding Trident

This spell brings into being a three-tined missile of temporarily hardened water, its piercing points hard enough to penetrate armor. It streaks straight at a chosen target creature, striking with the caster's THAC0, and deals 4d4 points of damage (half that if a successful saving throw vs. spell is made by the target) to any creature it hits. After striking or missing, the missile dissipates in a swiftly-scattering mist.

The material components are three drops of water and three arrowheads, dagger points, or metal wedges (they must be of a hard ferrous metal, but need not be tempered or ever been intended or used as weapons).