Tempest Blade

A cutting gust of wind streaks out in a 60 feet long and 5 feet wide line in a direction you choose. Each creature in that line must must a Dexterity saving throw. A creature takes 6d8 slashing damage on a failed save, or half as much on a successful one.

Any unprotected flames within the line are extinguished and gases are pushed 20 feet down the line.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.