Cryoblast

You send a wisp of white ice to a point you choose within range and then blooms with a slight crack into an explosion of hoarfrost. Each creature in a 20 foot radius sphere centered on that point must make a Dexterity saving throw. A target takes 10d6 cold damage on a failed save, or half as much damage on a successful one.

The frost spreads around corners. It freezes objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.