Deep Purifier's Swirling Storm

You create a miniature tornado in a 30-foot diameter, 100 foot tall Cylinder. Each creature in the Cylinder makes a Dexterity saving throw, taking 5d6 Bludgeoning damage plus 5d6 Thunder damage on a failed save, or half as much on a successful one. If the creature failed the save, it is trapped in the tornado, taking 2d6 Thunder or Bludgeoning damage(your choice) and is Restrained. A tornado can hold up to three Medium creatures, two Large creatures, or one Huge creature. A creature Restrained this way can try to escape the tornado, makes a Strength check with a DC equal to your spell save DC. On a successful check, the creature escapes the tornado, moving 5 feet away from it.