The Sacred Royal Medallion, an ancient medallion personally promulgated by the Royal Sacred Sect with the purpose to recruit outstanding elites from all around the world.
With the medallion in hand, one was considered an external disciple of the Royal Sacred Sect and would gain preferential treatment, able to bypass the tests of the nine great sects and directly take the test set by the Royal Sacred Sect. If one was able to pass that, they would become a true disciple of the Royal Sacred Sect and be rewarded all the privileges that came with it.
The test set by the Royal Sacred Sect was extremely stringent and fair. There would be major characters from the sect on the judging panel, nobody dared to break the rules nor try bribery or fraud. This was how the Royal Sacred Sect remained so overwhelmingly strong through the generations.