Like its lesser variant, the speeding trident, this spell brings into being a three-lined missile of temporarily hardened water, its piercing points hard enough to penetrate armor. This streaks at a chosen target creature, turning and twisting to follow any evasive movements, and strikes with the caster's THAC0, but at a +2 attack roll bonus (it is considered a +2 magical weapon for purposes of determining what it can hit). A battle trident deals 4d6 points of damage, plus 1 additional point per level of its caster. A successful saving throw vs. spell reduces damage by half. After striking or missing, the trident dissipates in a swiftly scattering mist.
The material components of a battle trident spell are three drops of water and three pointed pieces of any sort of hard ferrous metal.
Notes: Granted by the evil sea goddess Umberlee of the Forgotten Realms setting. This spell is found only in a few exceptionally rare tomes.