Wind Blade

A shimmering blade of wind forming a line 60 feet long and 5 feet wide scythes out from you in a direction you must choose. Each creature in the line must make a Dexterity saving throw. A creature takes 2d8 slashing damage on a failed save, or half as much on a successful one.

High level description:

When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st. In addition, for every two slot levels above 1st, you may increase either the length of the line by 10 feet or the width of the line by 5 feet.