Drown

You fill a breathing creature's lungs with water. Choose a creature you can see within range. The target must make a Constitution saving throw. On a failed save, the creature takes 9d6 necrotic damage, cannot speak, and has its movement reduced to 0 as it clutches its throat and chest. At the end of each of its turns, it must make a Constitution saving throw. If a creature fails three saving throws, including the initial saving throw, it drops to 0 Hit points and begins making death saving throws. On a successful saving throw, the creature ejects the water from its lungs, ending the spell. Creatures that can breathe water or do not breathe at all automatically pass their saving throws.