Chaotic Ball

A bright multi-colored electric ball flashes from your pointing finger to a point you choose within range and then blossoms with a low roar into an explosive eruption of the color of damage you got. Each creature in a 15-foot-radius sphere centered on that point must make a saving throw determined by damage type. A target takes 8d8 of rolled damage type on a failed save, or half as much damage on a successful one.

Roll a d20, which will determine the saving throw and damage type. (For casting at higher levels, you must choose so, before rolling for type)
1-2 Acid  (Dexterity Saving Throw) (Dark Green)
3-4 Poison  (Constitution Saving Throw) (Greenish-Yellow)
5-8 Cold  (Constitution Saving Throw) (whitish-Blue)
9-11 Fire  (Dexterity Saving Throw) (Red, Orange, and Yellow)
12- Radiant  (Intelligence Saving Throw) (White and Whitish-Yellow)
13-14 Necrotic  (Constitution Saving Throw) (Dark Green, Dark Purple, and Black)
15-17 Lightning  (Dexterity Saving Throw) (Blue)
18-19 Thunder  (Intelligence Saving Throw) (Mostly Transparent white)
20- Force  (Strength Saving Throw) (Any single solid color, and usually color of the floor)

-If Fire, Radiant or Lightning. It ignites flammable objects in the area that aren't being worn or wielded. The sparks and flames causing those without Tremorsense, Blindsight, or Truesight to not be able to see past 10ft while in the radius, until the caster's next turn ends. (This includes seeing into the radius)
-If Acid, Poison, or Necrotic. It gives any living creature a queasy feeling, in not wearing a plate armor variant. Causing their AC to go down by 1 for until the end of the caster's next turn.
-If Cold, Thunder, or Force. It causes the creatures in the radius to feel sluggish, either freezing up their muscles, causing vibrations in their body, or getting the wind knocked out of them. Making them to lose up to half their speed (Max 20ft loss) of all movements until it's the end of the caster's next turn.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.