Chaos burst

A brilliant rainbow light flashes in a 60-foot radius centered on a point you choose within range. Each creature in that light must make a Constitution saving throw. On a failed save, a creature takes 8d10 damage. On a successful save, it takes half as much damage.

Pick a d10 from the dice rolled. This decides the damage type of the spell.

d10/damage type

1/fire

2/cold

3/thunder

4/lightning

5/acid

6/poison

7/necrotic

8/radiant

9/force

10/psychic