Riptide

You conjure a sudden wave in a 20-foot square on the ground or in a body of water which you can see within range. Each creature in the area must make a Strength saving throw. On a failure, it takes 4d8 bludgeoning damage and a Huge or smaller creature is knocked prone. On a success, it takes half as much damage and is not knocked prone. All creatures failing the save are moved 15 feet in a direction of your choice.

At Higher Levels. When you cast this spell with a spell slot of 4th level or higher, the damage increases by 1d8 and the distance moved on a failed save increases by 5 feet for each slot level above 3rd.