At this moment, what shocked Chen Nianzhi most were the treasures within these three Thunder Tribulation Pools.
Of the three Thunder Tribulation Pools, the treasure in the one on the right had already been taken, most likely falling into the hands of the Annihilation Thunder God.
Yet Chen Nianzhi instantly deduced the origins of the treasures in the remaining two pools.
The small lightning tree on the left was called the Nine-Tribulation Thunderfruit, an eighth-tier supreme World-Opening ancient medicine.
This medicine had been nurtured from boundless thunderous power. It contained incomparably tyrannical medicinal force, capable of tempering a Primordial Immortal ancestor's World-Opening True Body.
Legend had it that if a Great Perfection Primordial Immortal consumed a Nine-Tribulation Thunderfruit, there was a ten percent chance of cultivating the legendary Taiyi Immortal Body.
What was Tai?
In ancient texts, it meant utmost antiquity and boundless vastness.
What was Taiyi?
It referred to the origin and essence of the universe and all things, also called the "Dao." It could also refer to the chaotic qi before Heaven and Earth were divided, showing just how exalted the title "Taiyi" was.
Within the Immortal Domains, there was a saying: Taiyi was boundless in extremity, while Great Luo was measureless.
Therefore, the title "Taiyi" ranked only below "Great Luo." It was one of the most exalted supreme titles, which was why the Celestial Immortal realm was also known as the Taiyi realm.
Under such circumstances, anything crowned with the title "Taiyi" was incomparably noble.
The Taiyi Immortal Body bore the name Taiyi—how could its status not be supreme?
As far as Chen Nianzhi knew, among the ultimate physiques that acquired living beings could cultivate, the Taiyi Immortal Body was the pinnacle.
Beyond that lay Wuji, where one had already reached the point of no further advancement.