Black Chill Blast

A blast of freezing black gas erupts from your hands. Each creature in a 30-foot cone takes 4d6 Necrotic damage and must make a Dexterity saving throw. A creature takes 5d6 cold damage on a failed save.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the cold damage increases by 1d6 for each slot level above 5th.