Crown of the frozen Dread

One creature of your choice that has a head that you can see within range must succeed on a Constitution saving throw or have there movement reduced by 10 feet and disadvantage on intelligence checks and saving throws for the duration.

While the target is affected by the crown a jagged Ice crown appears on its head, and a fatigue takes over in its eyes.

On your subsequent turns, you can use your action to damage the target takes 4d4, cold damage or the spell ends. Also, the target can make a Constitution saving throw at the end of each of its turns. On a success, the spell ends.