Water Whip

You create a medium whip of water that you lash out toward a creature in range. Roll a melee spell attack against the target. On a hit, the creature takes 1d6 bludgeoning damage with an additional 2D6 slashing damage on a critical rolls.  Any creature large size or smaller is pushed up to 10 feet away from you.

The spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).