Tempest of embers

You create a tornado of fire with a radius of 20 feet. The tornado is a heavily obscured area. Anyone who enters the tornado or begins their turn there must make a dexterity saving throw and take 8d10 fire damage on a failed save, or half as much on a success. Anyone who ends their turn in the tornado must succeed on a strength saving throw, or be sucked into the center of the tornado, and are restrained. AT the beginning of the restrained creatures turn, they immediately take 10d10 fire damage, and may repeat the saving throw. On a success, they take 3d10 fire damage and are launched out of the tornado in a random direction, taking 2d6 fall (bludgeoning) damage. A restrained creature who does not succeed on a saving throw at any point remains restrained until the spell ends. At the end of your turn at any point until the spell ends, the tornado moves up to 15 feet in a direction you choose.