The Horror

The target is momentarily transported into Tharizdun's prison where for the briefest moment they glimpse him. They must make a Wisdom saving throw or be rendered incapacitated for 1d4 rounds.  Worshippers of Tharizdun are immune to the effects of this spell. Creatures that cannot move between planes (such as those trapped in a force cage) are unaffected. 

At 5th level, the target is incapacitated for 1d10 rounds. At the end of their turn, they can make another save against this effect.