Crystallize

You create a 10-foot radius burst of jagged crystal centered on a point within range. Each creature in the area must make a Dexterity saving throw. On a failed save, a target takes 4d6 piercing damage it, the creature is incapacitated, and has a speed of 0 as it's encased within the crystal. On a successful save, a target only takes half as much damage and is not incapacitated. A creature encased in a crystal can make a Strength saving throw at the end of each of its turns, breaking free of the crystal, thus ending the conditions on a successful save. Additionally, each crystal has an AC of 13 and 22 health points. If a crystal is destroyed, any creature within it is immediately released. When you cast this spell, you can decrease the piercing damage by 2d6 to increase the crystal area's radius by 10 feet, to a minimum of 0 damage. At Higher Levels: When you cast this spell using a spell slot of
a or higher, the damage increases by 1d6 for each slot level