Crystal Shard Storm

A line made up of jagged shard dense crystal appears in a location you choose within range. The area of the storm consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a Dexterity saving throw. It takes 3d10 bludgeoning damage and 4d10 piercing damage,on a failed save, or half as much damage on a successful one.

You can create a new line of crystal as your action on any turn until the spell ends. Each line of crystal shards lasts 1 round then shatters into fine crystal dust and vanishes.

For the duration, your hand is covered in crystal and is resistant to Fire, Lightning, and Radiant effects and Damage.