Elris's Psychic Torment

You create a psychic link with a target of your choice that you can see within range and trigger a burst of arcane magic directly in it's brain. 

A target must make a Intelligence saving throw. The target takes 8d8 psychic damage on a failed save, or half as much damage on a successful one.
On a failed save a new link is created with the target and another creature of your choice within 15 feet of it who becomes the new target. This continues until a creature succeeds the saving throw or until no other creatures are available within 30 feet of the first target. 

A creature with an Intelligence score of 4 or lower can’t be affected by this spell. A creature can be targeted by this spell only once.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.