You control water to form a ring around yourself with a radius of 5 feet, which lasts for the duration. It is swirling and turbulent, moving at high speed.   The ring grants you resistance to fire damage. In addition, each creature that starts their turn within the ring or moves inside of it for the first time on a turn must make a Strength saving throw. On a failure, it takes 3d6 bludgeoning damage, is pushed back 10 feet away from you, and is knocked prone. On a successful save, the creature takes half as much damage and isn’t pushed or knocked prone.   When you cast the spell — and as a bonus action on each of your turns thereafter — you can use some of the water in the ring to make a melee spell attack against a creature within 20 feet of you. On a hit, the target takes 3d6 bludgeoning damage.