Ice Blast

You gather the moisture in the area into a ball, and then freeze it solid. You launch it at your target. Hitting your target requires a successful ranged touch attack. if your roll succeeds, the target takes 1d6 points of cold damage per caster level (maximum 15d6) and it's chilled for one round. A successful fortitude save negates the chill effect.

Trivia

 * Ice Blast's mechanics are from More Magic and Mayhem under the spell Frost Shock.
 * Frost Shock is a core ability for the Shaman class on the World of Warcraft MMORPG.
 * Frost Shock is a core shaman ability learned at level 22. In addition to its significant direct damage (which is instant cast and does not reset the shaman's melee attack), frost shock also snares the target.

Lesser Ice Blast
Level: Shaman 2

This spell is a lesser version of Ice Blast. The exception is that it deals 1d4 points of damage (maximum 10d4) per level, and there is no chilling effect.

Greater Ice Blast
Level: Shaman 6

This spell is a greater version of Ice Blast (see above). It deals 1d8 points of cold damage per level (to a maximum of 15d8), and a target that fails it's saving throw is chilled for 3 rounds.