Depthsurge

The water within the area suddenly explodes outward in a massive surge, as if driven by a powerful explosion.

(Stormwrack)  
Originally posted on D&D tools

Evocation [Water]

Level: Druid 8, Sorcerer, Wizard 8, Seafolk 8,
Components: V, S, M,
Casting Time: 1 standard action
Range: Long (400 ft. + 40 ft./level)
Area: 20 ft. radius
Duration: Instantaneous
Saving Throw: Fortitude partial
Spell Resistance: Yes

Each creature or object in the area is subject to damage equal to 2d6 + caster level.

Any creature struck by this attack must then succeed on a Fortitude save or be driven 10 feet away from the center of the blast.

If a ship is in the area, the captain must immediately make a sinking check (DC equal to spell save DC). See Sinking, page 32.

At least half of the spell’s area must contain water at least 10 feet deep, or else the spell fails.

You must center the effect at or below the water’s surface.

Material Component: A sphere of volcanic rock.