Adyana's Psionic Rending

The caster breaks through all mental defenses and weakens a creature’s mind from within, leaving them vulnerable for a time. Choose any number of creatures within a 30ft sphere that must make a Intelligence saving throw, and take 4d6 psychic damage or half as much on a successful save. In addition, a target that fail it's save loses any resistances to psychic damage for 1 minute, and takes additional damage equal to your spell casting modifier whenever they take psychic damage.

When this spell is cast at level 6 or higher, increase damage by 1d6 per spell level above 5th.