Twinkling Frost

A gentle shower of magical snow falls in a 20-foot-radius, 40-foot-high cylinder centered on a point within range. Each creature in the cylinder must make a Dexterity saving throw. A creature takes 4d6 cold damage on a failed save, or half as much damage on a successful one.

Any creature who starts their turn in the cylinder takes 1d6 cold damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage is increased by 1d6 for each level above 2nd.