Blalock's Andaman Riptide

Create a 10ft pool of Salt Water on the Ground or in a body of water that whirls the targets within dealing 4d6 bludgeoning damage. Targets within the AoE must make a STR saving throw against the caster's spell dc; on a failed throw receiving 1 point of Exhaustion.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.

Combo Spell: see Bombogenesis*