Tidal Blast

You conjure up high-pressured water on a point on the ground that you can see within range. It swells up into a powerful wave that move horizontally in a direction of your choice. All creatures in a 10-foot-wide and 60-foot-long line starting on that point must succeed on a Strength saving throw or take 4d6 bludgeoning damage and be pushed 30 feet in the direction of the wave, or until the end of the line, whichever is shorter, and be knocked prone. On a successful save a creature takes half as much damage, is only moved 10 feet, or until the end of the line, whichever is shorter and isn't knocked prone