This spell disrupts the motion of a body of water, making it calmer. Swimming checks and other checks made by vessels or creatures in the area of effect gain a +2 bonus. This is in addition to any other bonuses or penalties in effect due to the nature of the water.

Concentration checks (for spellcasting, etc) for people aboard ships and in the water, if required, are made with a +2 bonus.

Note that the surface of a body of water blocks line of effect, so a caster casting from above can only target a point on the surface. Casters who are underwater may pick any spot within range that they can see.

This spell has no effect on a non-moving body of water. The body of water must be at least 40 feet in one dimension, and at least 5 feet in all dimensions.

Scatterwave counters and dispels Scattercalm.

Material component: A flat rock, tossed towards the center of the emanating spread.