As he watched, Su Shi'er also secretly kept an eye on the changes in the formation triggered by everyone's attacks.
As time passed, his brows gradually furrowed without him noticing.
Although his own attainments in the Formation Dao were still far from its ultimate limits,
within the current Taicang Star, Su Shi'er believed he could surpass at least ninety percent of cultivators.
Whether the others were at the Out of Body stage, Spirit Severing stage, or even Body Integration stage,
no matter how he observed, however, he could never discern how this colossal formation had been constructed.
One had to know that the Earth Qi of Taicang Star had long since been destroyed, leaving not the slightest trace of spiritual energy on the entire star.
Yet nine times out of ten, setting up a formation required Heaven and Earth Spiritual Qi, or resources such as spirit crystals and Spirit Stones, to sustain it.
Unless it was a purely natural Magic Array, a special formation evolved through the power of nature itself.
Such formations did not rely on Heaven and Earth Spiritual Qi, or could take shape with merely a faint trace of spiritual energy.
But not only were the conditions required to form such arrays exceedingly harsh, their power was limited even once they were formed.
They might prove effective against Nascent Soul Stage cultivators or those below that realm.
Before cultivators of higher realms, they could never hold up.
Of course, if the formation itself was located in a natural perilous region, a place infused with chaotic spatial power, that would be another matter altogether.
At this moment, no matter how deeply Su Shi'er pondered, he could not connect the great formation before him with any formation he had encountered in the past.
Was this the legendary formation-setting method