From Pathfinder Lost Omens Divine Mysteries, which isn't enabled.

Rivethun Devotion

FEAT 8

Prerequisites Rivethun Emissary Dedication

Through study, dedication, and introspection, you've learned to wield magic that affects the spirit. You gain See the Unseen and Spirit Link as 2nd-rank divine innate spells. You can cast each of these spells once per day. If you're a master in Religion, spirit link is heightened to 3rd rank. If you're legendary in Religion, spirit link is heightened to 4th rank.

Pathfinder Lost Omens Divine MysteriesORC