Drown

You fill a breathing creatures lungs with water. Choose a creature you can see within range. It must make a constitution saving throw. If it fails, it takes 9d6 necrotic damage, cannot speak, has its movement reduced to 0, clutching its throat and chest. At the end of each of its turns, a creature must make a constitution saving throw. If a creature fails three saving throws, including the initial saving throw, then it drops to 0 Hit points. On a successful saving throw, the creature ejects the water, ending the spell. Creatures that can breathe water or do not breath automatically pass their saving throws.