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From Pathfinder Howl of the Wild, which isn't enabled.

Creature Comforts

FEAT 4
BARBARIANDRUID
Activity reaction
Prerequisites animal instinct or untamed order
Trigger You become frightened.
Requirements You're under a morph or polymorph effect.

You've found comfort in the forms of other creatures, insulating yourself from feelings of fear. Reduce your frightened condition value by 1 (to a minimum of 0).

Pathfinder Howl of the WildORC