There is a Legacy version
here.
Dread Secret
Focus 6Uncommon Concentrate Emotion Fear Focus Manipulate Mental Oracle Source Player Core 2 pg. 260Mystery loreCast [two-actions] Range 60 feet;
Targets up to 6 creatures
Saving Throw Will;
Defense Will;
Duration until the start of your next turn
You utter a powerful secret at odds with the fundamental nature of the target creatures. Choose a specific resistance or weakness with a numerical value that you believe one or more of the targets have due to
Recall Knowledge or previous experience with the targets, such as resistance to fire or weakness to silver. If the information is incorrect for a given target, the spell has no effect on that target. Affected targets must attempt a Will saving throw.
Critical Success The creature is unaffected.
Success The creature takes 1 damage that matches the type or trait of weakness you chose (thus triggering the creature's weakness) if you chose a weakness, or loses its resistance until the end of your next turn if you chose a resistance.
Failure As success, and the creature becomes
frightened 1 from the revelation of its dread secret.
Critical Failure As failure, except the creature is frightened 3.