Deep Surge

A concentrated ball of deep ocean water appears a point of your choosing. Creatures in a 10 ft. radius must succeed on a Dexterity saving throw or take 4d10 cold damage + 2d10 force damage. On a failed save, creatures hit by the spell are knocked prone and silenced until the end of their next turn. Creatures take half as much damage on a successful saving throw.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the cold damage increases by 1d10 for each slot level above 3rd.