Thought Rend

You tear through the mental defenses of a creature you can see within range. The target must make an Intelligence saving throw. On a failed save, it takes 8d8 psychic damage and is unable to cast spells until the end of its next turn. On a successful save, the target takes half as much damage and suffers no other effects.

At Higher Levels: When you cast this spell using a spell slot of 7th level or higher, the psychic damage increases by 1d8 for each slot level above 6th.