The truth about the Azure Nether Secret Realm had to begin with the Azure Nether Sword itself.
The Azure Nether Sword's predecessor was a [Strange Object] excavated from the depths of the Lemnian Hollow. It could drain Ether Energy from human bodies and emit an aura so violent it was nearly out of control.
Ordinary people would be torn to pieces merely by approaching it, let alone touching it.
Until Yunkui Mountain's founding patriarch appeared.
With Ether affinity and control far beyond that of ordinary people, he forcibly suppressed that violence. Afterward, he traveled the world with the object and tried countless methods, yet was never able to destroy it.
In the end, he forged it into a sword—the Azure Nether Sword.
The Azure Nether Sword's power had never been singular. Two forces warred within its blade day and night.
One originated from [Primus], while the origin of the other remained unknown to this day.
Yet some speculated that both forces came from [Primus]. They shared the same origin but differed in nature. Like when chaos first parted and black and white, yin and yang, were born together—opposed to one another, yet coexisting.
When the founding patriarch forged the sword, he had actually done only two things.
First, he carved out a [River].
He guided the surging energy within the Strange Object toward the blade, allowing it to be released and used.
Second, he built a [Dam].
All power that could not be guided away was intercepted by the Dam. Yet that power had never been peaceful. It battered the dam day and night, like trapped beasts crashing against a cage, never stopping for a moment.
That was why the Azure Nether Sword needed a swordmaster. The swordmaster's duty was to guard that [Dam]. Once no one watched over it,