Undertow

You conjure up a wave of water that emanates from you, and travels in a 5 ft tall, 40 ft long, and 60 ft wide cube. Each creature in that area must make a Strength saving throw. On a failed save, a creature takes 2d10 bludgeoning damage and is pushed back to the spells max length. On a successful save, a creature takes half as much damage and is not pushed.  if you push a creature into a wall, the creature takes another 2d10 bludgeoning damage and stops.

The water then spreads out across the ground in all directions, extinguishing unprotected flames in its area, leaving the ground wet, if possible.