You creat a 15ft radius sphere of pure unhinged elemental magic. Within the sphere earth, wind, lightning, fire, air and water all swirl around damaging any creature inside. If a creature starts or ends it’s turn on the inside of the sphere they must make a Constitution Saving throw or take 2d10 fire, lightning, bludgeoning, force and cold damage (total of 10d10) or half as much on a successful one. Additionally if the creature ends its turn in the sphere it must make a Dexterity Saving throw or be knocked prone.