From Pathfinder Lost Omens Cheliax, Infernal Inheritance, which isn't enabled.

Shadowy Disguise

FEAT 5

You wrap yourself in shadow to change your appearance. You can cast Illusory Disguise as a 1st-rank occult innate spell once per day. This spell gains the shadow trait.

Pathfinder Lost Omens Cheliax, Infernal InheritanceORC