The vow of the Twelfth Realm naturally holds immense restraining power.
Saint Emperors like Hong Yun dared to let Xing Yuan come alone because they knew the terrifying consequences of breaking the vow.
Even when the time comes, even if not under the same starry sky, the backlash will still descend upon him.
Almost instantly, as the punishment of the Starry Sky Rules fell, in Wang Sheng's eyes, Xing Yuan's aura plummeted, and within moments, he fell from the exalted Saint Emperor to an Eleventh Realm Saint.
However, this was not the most terrifying outcome.
This wasn't just a fall in cultivation strength but in all aspects, such as lifespan.
A Twelfth Realm Saint Emperor's lifespan is tens of millions of years, while an Eleventh Realm Saint's is only a few million years.
And Xing Yuan himself was an ancient Saint Emperor, having existed since the cultivation emergence of the Old Land Starry Sky.
After Xing Yuan's realm fell, it caused a consequence.