Among the Three Great Power Alliance's three void forces, the calmest person after receiving the orders of the Three Rule Lords was Zhang Cheng, the pavilion master of the Holy Sky Pavilion.
Although he was also curious why the Three Rule Lords had initiated the War of Rules ahead of schedule,
he had long anticipated that this War of Rules would be much larger in scale.
It was not because of anything else, but because he knew a secret: the Three Rule Lords were nearing the end of their lifespans.
Although the Three Rule Lords had always appeared incomparably powerful,
and had always maintained the majesty of having their words become law before other Supreme God Realm warriors,
whenever Zhang Cheng saw the Three Rule Lords, he could sense from their auras that, compared with ordinary Supreme God Realm warriors, their life force was actually draining much faster.
He could sense this purely because among the cultivation arts he practiced was a useless art capable of detecting changes in life force.
Although when he had first cultivated this art, he had also felt that it was completely useless.
After all, no matter what realm a warrior reached, their life force would eventually drain away.
What difference did it make whether one knew the true rate at which it was draining?
That was because every warrior would have a premonition before their lifespan came to an end.
Thus, for warriors, this kind of cultivation art was truly and utterly useless.
Back then, he had merely cultivated it out of curiosity, wanting to see what it was like.
He had never expected that this useless art would actually allow him to uncover the greatest secret of the Three Rule Lords.
That was, compared with warriors like them who had reached the Rule