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From Pathfinder Impossible Magic, which isn't enabled.

Chapbook of Terrors

ITEM 4
Price 80 gp
Usage held in 1 hand
Bulk L

This lurid pamphlet contains spooky tales about ghosts, monsters, and murderers, all illustrated in gruesome detail. The stories, fortunately, are only fictions… or are they?

Activate—Horrify (concentrate, mental, spellshape)
Frequency once per day

Effect If your next action is to Cast a prepared Spell with the fear trait, creatures frightened by the spell also take 1d6 persistent mental damage as they dwell on your terrifying tale.
Pathfinder Impossible MagicORC