Elemental Chaos

You create a massive sphere of the elements: air, water, fire, and lightning around you. With a flick of the wrist, you can choose between the elements to be your damage type and you can hit a 5-ft sphere in a 120 ft range with that type. If hit, this does 4d8 of that damage and you have an advantage if the target is wearing metal armor. You are immune to the other types of element damages that you did not attack with.