Blizzard

A blue streak flashes from your pointing finger to a point you choose within range and then blossoms with a high pitch whistle into a massive blast of ice and snow. Each creature in a 20-foot-radius sphere centered on that point must make a Constitution saving throw. A creature takes 8d6 cold damage on a failed save, or half as much damage on a successful one.

The cold spreads around corners. It freezes water and objects in the area that aren't being worn or carried.

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.