There is an ancient saying that the Emperor is Heaven's favored child and a true dragon incarnate, hence the title True Dragon Emperor.
Naturally, this true dragon is not that true dragon... The True Dragon Emperor is merely an abstract description. Yet even an abstract effect is enough to highlight the Emperor's noble status.
There is also talk of the emperor being protected by a true dragon, impervious to all evils—as for this true dragon mentioned here, it's actually the ley line. Every dynasty has its unique ley line, be it large or small. The monarch of the era is the carrier of the current dynasty's ley line fortune.
When the ley line prospers, the national fortune is strong; when the ley line declines, the nation falls and so does the emperor.
