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From Pathfinder Secrets of Magic, which isn't enabled.

Work Yourself Up

FEAT 8
ARCHETYPECONCENTRATE
Activity 2 actions
Archetype Cathartic Mage
Prerequisites Cathartic Mage Dedication
Requirements You have a reaction available and aren't prevented from using Catharsis.

You concentrate on your mental state, tapping into that raw emotional energy. Take your Catharsis reaction, causing the catharsis activation and entering your emotional fervor as normal. The fervor lasts only until the end of your turn. At the end of your emotional fervor, you experience the effects of your emotional fallout, as normal.

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