Crushing Tide

The sea is a baleful mistress, and all must bow to her.
You summon a rushing wave of water that manifests in a 60-foot line that is 15 feet wide. Creatures within the area must make a Strength saving throw. If they fail, they are knocked prone and take 3d6 bludgeoning damage. If they succeed, they are not knocked prone and take half as much damage.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the bludgeoning damage increases by 1d6 per spell slot level above 3rd.