Player > Feats > Frightful Display
You unnerve your spell’s victim with odd gestures, cackling laughter, or other effects.
Cha 15, Intimidate 5 ranks, ability to cast spells.
As a reaction when a creature fails a saving throw against a spell you cast this round, you can attempt an Intimidate check to demoralize that creature. You can target only one creature regardless of how many creatures your spell affected, and a given creature can’t be targeted by this ability more than once per day.