You temporarily open a rift to the Far Realm, mentally assaulting all creatures in a location that you specify. Each creature in a 20-foot radius centered on a point within range must make an Intelligence saving throw. Each creature targeted by the spell takes 6d6 psychic damage on a failed save, or half as much on a successful one. On a failed save, the target is also incapacitated until the start of your next turn.

At higher levels: When you cast this spell at a higher level, it does an additional 1d6 psychic damage per spell level above 5th.