Therefore, the family had its members create unique markings to distinguish friends from foes when encountered outside.
Although these markings could sometimes expose the family's secrets, they were changed every three years, with a total of ten different markings completing a cycle every thirty years.
Under such circumstances, as long as a cultivator remembered the markings and their order of change, they could safely identify a person's affiliation without revealing themselves in inconvenient situations.
Many families and sects used this method of marking.
However, this method was of little use against cultivators whose power far surpassed others; they only needed to capture the target individual and use Divine Sense to search the soul, thus gaining all of the targeted person's memories.
But soul searching was not so easy; at minimum, a great disparity in Divine Sense was required for success, otherwise it was very difficult to achieve.
