Chilling Roar

A series of jagged icy stalagmites 3 ft high erupts from the ground in a 20- foot-radius originating from you. Each creature in the radius must make a Dexterity saving throw. A creature takes 2d8 piercing damage and 4d6 cold damage on a failed save, or half as much damage on a successful one.

The icy stalagmites turn the  area of effect into difficult terrain for 10 minutes.

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