You manifest the jaws of a leviathan, erupting from a point on the ground or on the surface of water that you can see within range. Each creature within a 20-foot radius, 80-foot high cylinder centered on the point must make a Dexterity saving throw. On a failed save, a target takes 12d6 force damage and is banished. On a successful save, it takes half as much damage and isn't banished.

If the spell is cast targeting a point on the ground, all creatures banished by this spell are transported to a harmless demiplane. Each creature remains there until the spell ends, at which point it reappears in the space it left or in the nearest unoccupied space if that space is occupied.

If the spell is cast targeting a point on the surface of a body of water, each creature is banished to the depths of the ocean, each creature is blinded and restrained, and takes 6d6 bludgeoning damage at the start of each of its turns. Each creature remains there until the spell ends, at which point it reappears in the space it left or in the nearest unoccupied space if that space is occupied.

If you touch a body of water when casting this spell, you can choose a point within 180 feet of you that is in the same body of water. The spell is cast as if you were at the chosen point, but you must use your own senses.