Even if this Phoenix Divine Mark supreme treasure had not been created by the original Undying Bird, but was instead forged from the life souls and essence spirits of the Phoenix Ancestor and Phoenix Ancestress, who had led the phoenix clan to glory after the era of the Ancient Cultivators.
It still remained inseparably tied to fire. The purer the phoenix clan's bloodline, the greater their comprehension of the Fire Law, not in the slightest inferior to their core Nirvana Law...
Because of the Two Extremes Authority, despite not putting much effort into comprehending it over the years, you had still grasped the Fire Law to the eighth grade. Such depth of comprehension was not poor among Quasi-Emperors; even many Quasi-Emperors who primarily cultivated the Fire Law had reached no further.
Yet there was still some distance before you could touch upon rules. But now, in the True Phoenix Form, the power of the Fire Law you wielded had actually barely reached the level of touching rules!
This improvement could not be called anything but immense. It even made you consider spending time to comprehend the Fire Law, though it was unclear whether such changes would reduce the duration you could maintain your True Phoenix Form... There was no harm in trying, so you believed it was worth a test.
As for why the Samadhi Divine Fire had undergone such tremendous changes, you were not particularly surprised. Even though its creation had not the slightest connection to the phoenix clan, at its root, the Samadhi Divine Fire was indeed one of the purest manifestations of Fire Source power.
The phoenixes had been created by the god named "Fire," and they too had been born from fire. It was therefore not difficult to understand why their powers shared the same origin.