Brain Spike

You conjure a barrage of illusory knives and cast them in a target direction. Up to 2 creatures in a line in that direction, must make an intelligence saving throw. On a failure, it takes 1d6 psychic damage. On a success, the creature gains advantage on all saving throws caused by this spell within 24 hours.

At Higher Levels: The damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).

Credit to  "/u/Consequence6 on Reddit"