3-level Evocation
A frozen spear of ice pierces through a line 30 feet long by 5 feet wide starting at a point in range that you can see. Each creature in the line must make a Dexterity saving throw. A creature takes 6d8 cold damage on a failed save, or half as much damage on a successful one.
When you cast this spell using a spell slot of 4th or higher, the damage increases by 1d8 for each slot above 3rd.