Blast of ice

A bright streak of ice flashes from your pointing finger to a point you choose within range and then blossoms with a low roar into an explosion of ice that fades away after a minute. Each creature in a 10-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 4d12 cold damage on a failed save, or half as much damage 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 1d12 for each slot level above 3rd.