Elris's Mind Coil

You channel the strengh of your mind to protect you. Your will extend to a distance of 15 feet for the duration and harrass the psyche of every affected creature. 

When you cast this spell, you can designate any number of creatures you can see to be unaffected by it. An affected creature can’t take reactions in the area, and when the creature enters the area for the first time on a turn or starts its turn there, it must make a Intelligence saving throw. On a failed save, the creature takes 4d6  psychic damage. On a successful save, the creature takes half as much damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.