C993 Once the Rules Were out the Whole World Was in an Uproar
The establishment of the Adventurers' Union was the common requirement of all the Extraordinary in the world. They needed a strong, fair, and trustworthy platform to build a trading market between the Extraordinary and mortals.
Such an organization was established by the True Martial Immortal Sect, so it was naturally understandable. This was because it had branches all over the world