Thunder Pivot.
The thirty-six thunderbolts were still cycling up and down, with another ten years or so before they would finish. Xu Xuan had now returned to this secret place, with one more object in his hand.
It was black throughout, neither metal nor wood, resembling both a sword sheath and a mysterious embryo. Its Dao lineage seemed to be the Sword Dao, yet also some form of Metal Virtue or Wood Virtue, or even another Dao altogether.
It was precisely the Dharma Treasure he had just borrowed from Penglai!
[Soaring Beyond]
Xu Xuan could now be certain that Arcane Arts had a corresponding Dao lineage.
The name of this Dao must have been hidden away. Even the history of Calamity Blessing contained no record of it, yet all these strange phenomena proved that this lineage must exist.
This sheath borrowed the power of Severance to divide Primordial Chaos, but it could not divide it evenly. It could only cleave out solitary yin and solitary yang. Once freed from the sheath's restraint, yin and yang would turn back into Primordial Chaos in an instant.
Even so, the mystery of dividing and reuniting Primordial Chaos involved two transformations: "Severance" and "Even Density."
Merely comprehending this object would allow Xu Xuan's [Returning Dao Pivot] to transform into a realm unprecedented throughout history, remedying its final shortcoming!
In this way, drawing the [Upper Profound Yin-Yang Ceremonial Sword] from this sheath would allow it to transform into utmost yang or utmost yin at any moment. Returning it to the sheath would turn it back into boundless Primordial Chaos.
That damaged Immortal Sword now rested on Mount Upper Preservation. It was made of wood, presumably because Pang Yan had once borrowed the cause and effect of Taboo Wood.
Holding this Dharma Treasure, Xu Xuan began