Ice Comet is a Guild skill, found in the Mages Guild Skill line. Great Ultimate for Frost damage based Builds and to crowd control enemies.

Ice Comet
200 Ultimate Instant Cast Target: Enemy Base Skill: Meteor
Call a comet down from the constellations to blast an enemy, dealing 4620 Frost Damage to all enemies in the area, knocking them down, stunning them for 2 seconds, and reducing their Movement Speed by 50% for 5 seconds. After impact, enemies in the target area take 1319 Frost Damage every 1 second for 11 seconds.

Ice Comet is a morph of the Meteor base skill. The other morph is Shooting Star.