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Freezing Sphere


School evocation [cold]; Level magus 6, sorcerer/wizard 6; Subdomain ice 7; Elemental School water 6

CASTING

Casting Time 1 standard action
Components V, S, F (a small crystal sphere)

EFFECT

Range long (400 ft. + 40 ft./level)
Target, Effect, or Area see text
Duration instantaneous or 1 round/level; see text
Saving Throw Reflex half; see text; Spell Resistance yes

By the way...
This spell can be used to attempt to trap a ship in ice by targeting the water around the ship rather than the ship itself. The ship's speed is reduced to 0 for the duration of the spell unless the pilot of the ship makes a DC 25 sailing check to break free of the ice.

Source Skull & Shackles Player's Guide