Waters of the Deep

You open a portal to an area deep below the surface of The Immortal Abyss, and crushing water rushed forth onto a creature. A creature affected by this spell must make a Strength saving throw: on a failed throw they take 2d6 bludgeoning damage a fall prone for 1 round, on a successful throw they only take 2d6 bludgeoning damage.

At Higher Levels. At each spell slot higher than 1st used to cast this spell add an extra 1d6 bludgeoning damage.