Blizzard's Magnificent Blizzard

You point at an area within range, and a flurry of snow and ice erupts from your hand, growing into an intense frosty storm. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 9d6 cold damage on a failed save, or half as much damage on a successful one.

The storm spreads around corners. It freezes objects in the area that aren't being worn or carried, making them shatter.

On a failed save, affected targets become grappled until the end of their next turn. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.