Aurora Blast

You call upon the frigid power of arctic nights, summoning multicoloured beams of light to strike your foes with supernatural cold.

Eight beams of vivid light streak down from the sky at points you choose within range. Each beam is 10 feet wide, and each must strike a different point, although a big enough creature may be struck by multiple beams.

A creature struck by a beam must make a Constitution saving throw, taking 20d6 cold damage on a failed save, or half as much damage on a successful one. If a creature is targeted by more than one beam the damage is increased by 1d6 per beam.