Curse Water

(Player's Handbook v.3.5, page 216, DnD 3.5)

Necromancy[Evil]

Level: ; Cleric 1; Blighter 1; Death Master 1
Components: V, S, M
Casting Time: 1 minute
Range: Touch
Target: Flask of water touched
Duration: Instantaneous
Saving Throw: Will negates (object)
Spell Resistance: Yes (object)

This spell imbues a flask (1 pint) of water with negative energy, turning it into unholy water.
Unholy water damages good outsiders the way holy water damages undead and evil outsiders.
Material Component: 5 pounds of powdered silver (worth 25 gp).