Cone of Chaos

A wave of fluctuating chaotic energy erupts from your hands. Each creature in a 60-foot cone must make a Constitution saving throw. A creature takes 8d8 damage on a failed save, or half as much damage on a successful one.

The type of damage is determined by rolling a d8 immediately before you roll the damage dice:

At Higher Levels: When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.