Inaccurate?

Stone Storm

(Secrets of Sarlona, p. 129)

Evocation
Level: Cleric 5, Sorcerer 5, Wizard 5,
Components: V, S, M,
Casting Time: 1 standard action
Range: Long (400 ft. + 40 ft./level)
Area: Cylinder (20-ft. radius, 40 ft. high), 10-ft. radius; see text
Duration: 1 round
Saving Throw: None
Spell Resistance: No

Thunderous grinding splits the air. A pounding storm of stones slams down, pulverizing all beneath it as razor-sharp fragments ricochet out in all directions.

A blinding storm of bullet-sized stones pounds down for 1 round. All creatures in the area take 3d6 points of bludgeoning damage and 3d6 points of slashing damage as the stones slam down, then shatter to razor-sharp shards (no save for either, but a creature's damage reduc­tion applies to this damage, which is treated as magic and bludgeoning and magic and slashing, respectively). A -4 penalty applies to Listen checks made within the stone storm's effect, and all land movement within its area is at one-quarter speed.

Material Component: A handful of obsidian pebbles.