Teeth to Terror

Target must make a will save or the target believes its teeth are falling out, crawling along its face, stabbing into its body, and cramming themselves down its throat. The target takes 2d4 psychic damage. 1d4 psychic damage beginning of each of its turns an effected target must make a will save, on failure target takes 1d4 psychic damage and remains frightened, on success target is no longer impacted by the spell. The target takes a –1 penalty to Strikes with its jaws or teeth while it is taking persistent psychic damage. 

Success The target takes half damage and no persistent mental damage.
Failure The target takes full damage and persistent mental damage and is frightened

You can cast this spell at higher levels. For each level above 2 one additional target can be chosen, add an additional 2d4 initial psychic damage, and add an additional 1d4 to persistent psychic damage.