Coldfront

You rub your hands together and push out a small wall of freezing temperature. Each creature within the radius must make a Constitution saving throw, on a failed save the creature takes 4d6 cold damage, or half as much on a successful one. Every 15-feet the wall grows 5-feet in width and deals an additional d6 damage, anywhere the spell passes becomes difficult terrain until the start of your next turn. This spell can move through solid objects no thicker than 5-feet and deal half damage to any creature past that.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the range increases by 15-feet for each slot level above 4th.