Aldori Dueling Disciple (Combat)Source Inner Sea Combat pg. 10 (Amazon)
Your pride and prowess in the art of Aldori swordplay grants you both bravery and bravado.
Prerequisites: Exotic Weapon Proficiency (Aldori dueling sword), Weapon Finesse, Weapon Focus (Aldori dueling sword).
Benefit: You gain a +2 morale bonus on all Intimidate checks to demoralize opponents, and the DC of any attempt to demoralize you increases by 2. When you’re participating in a duel, these bonuses increase to +4.Source Weapon Master's Handbook pg. 24 (Amazon)
During any combat that is not a duel, you can spend 1 stamina point at the start of your turn to treat the combat as a duel until the start of your next turn for the purpose of gaining the benefits of the Aldori Dueling Discipline feat.