Chillwind

A 30 ft. long and 5 ft. wide line of ice pierces forth from the ground of a point within range. Each creature in the line must make a dexterity saving throw. A creature takes 6d6 cold damage and has its movement reduced by 15 ft on a failed save, and half as much on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.