Arctic Blast

A bright streak flashes from your pointing finger to a point you choose within range and then blasts into a area of frigid air. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 6d6 cold damage and moves half its speed until your next turn on a failed save, or only half as much damage on a successful one.

The cold air spreads around corners. It freezes open bodies of water in the area of the spell.

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.