Ego Breaker

You enter the mind of one creature within range, targeting their ego, and shatter the eggshell in your hand. The creature must succeed on a Wisdom saving throw or take 5d8 Psychic damage and have Disadvantage on Charisma saving throws and ability checks for the duration, or half as much and no disadvantage, if it succeeds.

If it fails, the creature can make another Wisdom saving throw at the end of each of its turns. On a success, the effect ends.

At higher levels: This spell does 1d8 additional damage for each spell slot above 4th level.