Aurora

A glowing, undulating ribbon of light  100 feet long and 5 feet wide streaks across the sky from a point in a  direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 4d6 cold and 4d6 radiant damage on a failed save, or half as much damage on a successful one. Regardless of a failure of success, each creature must then make a wisdom saving throw. On a failed save, the creature is charmed for 1 minute.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 cold and 1d6 radiant for each level above 4th