Chromatic Vortex

You create a tornado of energy centered at a point with 200 ft, the tornado is a 25-foot-sphere. All targets within its radius must make a STR save. On a fail, they take 8d10 damage (Choose between Acid, Cold, Fire, Lightning, Necrotic, Poison, Radiant, or Thunder) they are also sucked into the middle of the vortex and must keep repeating the save until they succeed, or the spell ends. On a success, they take half damage and can move freely. After every turn, you can change the damage type of the vortex as a bonus action.