A wave of water sweeps out from you. Each creature in a 15-foot cone must make a Strength saving throw. On a failed save, a creature takes 2d6 bludgeoning damage and is knocked 10 feet away from you. If a creature is knocked into a wall, another creature, or fails by 5 or more, it is additionally knocked prone. On a successful save, the creature takes half as much damage and is not knocked back. If there is a source of water of at least 5 cubic feet within 5 feet of you when you cast the spell, you can displace that water, increasing the range of the spell to a 25 foot cone.