The Sunken Kings Curse

You target one creature within 30 ft. that is large or smaller, they have to make a intelligence saving throw or begin to suddenly begin drowning as a Swirling Whirlpool conjures under their feet. They take 8d8 Cold Damage as long as you maintain concentration on this spell or they succeed the save. At the end of each of the targets turns, they take 3d8 cold and must make another Intelligence Save, ending the effect on a success. The target can in fact drown if they are not able to spend one minute under water. After this spell ends and the target is not dead, they will have a errational fear of water and can not swim for 24 hours.