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

Basic Pactbreaker Spellcasting

FEAT 4

Prerequisites Infernal Pactbreaker Dedication

You gain the basic spellcasting benefits. Each time you gain a spell slot of a new rank from the infernal pactbreaker archetype, add two common spells of that rank to your contract folio.

Pathfinder Lost Omens Cheliax, Infernal InheritanceORC