As his words fell, Yang Kai's right eye turned pitch-black — a pure, absolute blackness that seemed capable of devouring all things in the world. The Demonic Yuan across his body roared and surged skyward, and his already-weakened aura suddenly skyrocketed.
A humming reverberation echoed through the grand hall — loud, yet deep and solemn: "Black Pupil Purgatory, Boundless Darkness!"
This had always been Yang Kai's most powerful killing move, even surpassing the Dragon Transformation Secret Art. Back when he had entered the demonic path at the Dao Source Realm and fought three Emperors single-handedly, he had still managed to retreat unscathed — testament to the sheer power of this technique.
But power came at a price. Each use carried the risk of Yang Kai falling fully into the demonic path.
Previously, activating this secret art required him to unseal the seal at his dantian and release the demonic qi within. But now, after advancing to the Third Stage Emperor Realm in the Demon Domain and truly becoming one with the demonic path, all his power had transformed into Demonic Yuan. There was no longer any need to unseal anything, no need to worry — he could unleash Boundless Darkness anytime, anywhere.
Facing a Pseudo-Emperor, Yang Kai dared not hold back in the slightest. That was why he had opened with the Legion Commander's Decree, hoping for a swift victory. Unfortunately, things had not gone as planned — the Great Emperor's divine ability had been nullified by the Endless Hourglass, accomplishing nothing. He then used the Dragon Transformation Secret Art and summoned the Mountain and River Bell, yet the results were still unsatisfactory. Now, all that remained was this one move: Boundless Darkness.
This was his final killing technique.
Truthfully, even with this ultimate trump card, Yang Kai could not guarantee that he would definitely defeat Wind Lord. In the Demon Domain, he had personally slain a Half-Saint, but that Yinsi had been gravely wounded — his injuries from the Battle of Zhou Tian had yet to heal, which had given Yang Kai his opening. Moreover, Yinsi specialized in charm techniques, which were naturally countered by Yang Kai. How could such an opponent not fall?
Wind Lord was different. He had spent a hundred years here recovering, his wounds fully restored. Even with the energy expended in their earlier exchanges, he was still far stronger than Yinsi had been at that time.
The moment Boundless Darkness was unleashed, the grand hall was plunged into impenetrable darkness. It was a blackness beyond description — not only was vision rendered useless, but even spiritual perception was completely blocked.
Wind Lord hadn't expected Yang Kai to still possess such a powerful technique at this point. His expression flickered with surprise, but he showed no panic. He cast a protective spell over himself, holding the hourglass in his left hand and the small fan in his right, focusing his attention and waiting.
Just then, a sudden alarm stirred within him, and he looked upward.
Though it was so dark that nothing could be seen, Wind Lord could clearly feel that in the sky above, a colossal, pitch-black eye gazed down at him in silence. That invisible oppressive weight made his heart tremble involuntarily with unease.
Without warning, a deep sense of danger flooded his heart. Without hesitation, Wind Lord swept the small fan in his right hand forward. A roar erupted as a tornado shot out from the fan, transforming into a massive Wind Dragon that lunged forth with savage ferocity.
On the opposite side, Yang Kai was already charging in. Seeing this, his eye twitched — a Pseudo-Emperor truly wasn't easy to deal with. Within Boundless Darkness, Wind Lord should have been completely blind and deaf, yet he had still precisely located Yang Kai's position and detected his movements. This man was no ordinary fighter.
Such a capable individual, yet he had fallen to the Demonic Heavenly Way and become a lackey of the Demon Race. What a waste.
The Wind Dragon pounced, and Yang Kai met it head-on. Raising his right hand high, he brought the Mountain and River Bell crashing down. Silent as the strike was, the dragon's head shattered — then the Wind Dragon suddenly split into thousands of wind blades that shot out in every direction.
Flames erupted across Yang Kai's body as the wind blades slashed against his dragon scales. The strikes made no sound but carried considerable force. Caught slightly off guard, Yang sustained numerous small wounds across his body — but in return, he had closed the distance to within thirty feet of Wind Lord.
At such close range, Yang Kai raised his palm. An enormous hand blotted out the sky above Wind Lord and crashed down with savage force.
Wind Lord snapped his head up as though he could see the incoming palm. With a fierce shout, he raised his own palm to meet it. Gale-force winds converged in his palm, forming into a sky-pillaring giant hand.
Another silent collision. When the two palms met, Yang Kai's massive frame tilted slightly backward, nearly knocked off his feet, while Wind Lord's body sank abruptly.
This exchange was dead even!
Yang Kai gritted his teeth; Wind Lord was stunned.
Unlike their previous exchanges of ranged techniques, this had been a direct clash of raw power. A Third Stage Emperor Realm cultivator matching him blow for blow — how could Wind Lord remain composed?
But he didn't pause for an instant. He immediately steadied himself and lunged toward the source of that palm force, counterattacking without hesitation.
Would Yang Kai retreat? Never. He shifted his feet against the ground, stabilized his body, and threw a punch.
Another collision. Another mutual repulsion...
In an instant, within the pitch-black grand hall, a Pseudo-Emperor and a Third Stage Emperor Realm cultivator fought with earth-shattering, dazzling intensity.
This kind of brute-force exchange was exactly what Yang Kai wanted. Wind Lord's cultivation was higher, his years of practice far longer, and he now wielded the Endless Hourglass. If this turned into a prolonged battle of techniques, Yang Kai would have no hope of winning. Wind Lord playing right into his hands suited him perfectly.
But for Wind Lord, there was nothing he could do about it.
The Endless Hourglass was formidable, yet it couldn't penetrate this secret art. His vision was stolen, and even his spiritual sense was blurred to the extreme — he simply could not locate Yang Kai. His current state was that of a man who was both blind and deaf, able to lock onto Yang Kai's position only through the faint fluctuations of qi at the instant of each clash. The moment that instant passed, he could no longer hope to find Yang Kai again.