Creeping Cold

You turn the target's sweat into ice, causing damage as ice forms in and on the skin. Choose a creature you can see within range. That creature must make a Constitution saving throw. On a failure, it takes 3d6 Cold damage. On a success the creature takes half as much cold damage and is not otherwise affected. At the start of each of its turns, it makes another Constitution saving throw, taking 3d6 Cold damage on a failure. Once it has succeeded  on a saving throw, the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, increase the initial damage by 1d6 per slot level above 2nd.