Rend (5e Spell)
From D&D Wiki
You weaken the mind of a creature you can see within range, leaving them vulnerable for a time. The target must make an Intelligence saving throw. On a failed save, the target takes 6d6 psychic damage and becomes mentally exposed; for the duration, the target takes an additional 1d6 psychic damage the first time it takes psychic damage on a turn. On a successful save, the target takes half as much damage and isn't mentally exposed.
At Higher Levels. When you cast this spell using a spell slot of 5th or higher, the psychic damage (both initial and from taking psychic damage) increases by 1d6 for each slot level above 4th.