Crystal Barrage

You hold a prism out in front of you and channel your magic through it firing a barrage of spectral crystals. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 1d6 magical piercing and 2d6 of either acid, cold, fire, lightning, poison, or thunder damage your choice on a failed save, taking half as much on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the secondary damage increases by 1d6 for each slot level above 1st.