Crystal Shardstorm

You conjure a swirling storm of razor-sharp crystal shards in a 20-foot radius centered on a point within range. Creatures in the area when the storm appears must make a Dexterity saving throw, taking 4d10 magical slashing damage and 4d10 force damage on a failure or half as much on a success. The storm lasts for 1 minute or until concentration is broken.

While the storm persists, the area becomes difficult terrain, and creatures that start their turn in the storm or move through it take 2d10 slashing damage and 2d10 force damage.