Auril's Flowers v2

Moisture from within the ground at a point within range freezes as several lances of ice thrust up from within, flinging debris around the battlefield. 

Each creature in a 30-foot cylinder must make a Dexterity saving throw. A creature takes 4d8 piercing damage and 4d8 cold damage on a failed save, or half as much damage on a successful one. The ground within the area is also considered difficult terrain until cleared of debris. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the piercing and cold damage increase by 1d8 for each slot level above 6th.