Conjuration(Creation) [Good, Water]
Level: Cleric 3, Paladin 3
Components: V, S, M, DF
Casting Time: 1 standard action
Range: 20 feet
Area: Cylinder (20-ft. radius, 20 ft. high)
Duration: 1 round/level (D)
Saving Throw: None
Spell Resistance: No
You call upon the forces of good, and a heavy rain begins to fall in the area you indicate, its raindrops soft and warm.
The driving rain created by this spell falls in a fixed area once created. The storm reduces hearing and visibility, resulting in a -4 penalty on Listen, Spot and Search checks. It also applies a -4 penalty on ranged attacks made into, out of or through the storm. Finally, it automatically extinguishes any unprotected flames and has a 50% chance to extinguish protected flames (such as those of lanterns).
The rain damages evil creatures, dealing 2d6 points of damage per round (evil outsiders take double damage) at the beginning of your turn.
Material Component: A flask of holy water (25 gp).
Note: This version of the spell was updated from the Planar Handbook version and given a 20-foot range in order to make the spell eligible for the Persistent Spell feat.
Source: Spell Compendium (Page 115)