Unbreakable Mastery
When clad in steel, you fend off most attacks. Your proficiency rank with medium armor and heavy armor increases to master. Your proficiency rank with light armor and unarmored defense increases to expert.
Pathfinder 2e Database
When clad in steel, you fend off most attacks. Your proficiency rank with medium armor and heavy armor increases to master. Your proficiency rank with light armor and unarmored defense increases to expert.