Blizzard

A flash of frost appears in a point you choose within range and then erupts into an explosion of ice. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 5d8 cold damage on a failed save, or half as much damage on a successful one.

The spell makes terrain in the area difficult by ice and snow until the end of your next turn. In addition, any unprotected flames within the area will be extinguished.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.