Cleaving Wind

Two small tornadoes appear at your palms and you put your hands together, causing the two tornadoes to combine and expand forward in the direction in which you point your palms in a line 100 feet long and 5 feet wide. Each creature within the line must make a Strength saving throw. On a failed save, they take 5d8 bludgeoning damage and are knocked prone. On a successful save, they take half damage and are not knocked prone. 

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