Those who magically pry into your mind becomes privy to your most frightening dreams.
Prerequisite: Exposure to phantasmal killer spell.
Benefit: Whenever someone successfully targets you with a divination spell or effect, you can send that caster a nightmarish vision. This vision functions as a phantasmal killer spell, except that the form comes from your dreams, not the other creatures dreams. The other creature must succeed on a Will save (DC 14 + your Cha modifier) to disbelieve the nightmare and a Fortitude save (DC 14 + your Cha modifier) to avoid dying from fear.
Source: Unearthed Arcana