Crushing Wind

A blast of violent winds erupts from your hands. Each creature in a 30-foot cone must make a Constitution saving throw. A creature takes 6d6 force damage and is knocked back 30 feet on a failed save, or half as much damage on a successful one, and are is no longer knocked back. 

If the creature hits a wall, a strong solid object, (such as a pillar or a tree), then they take an additional 4d6 force damage. If the creature hits another creature, the creature being hit takes 1d6 force damage and is knocked prone. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 for each slot level above 4th.