On the Taiyin Star, Li Yi and Tongtian each obtained a innate supreme treasure, and both were overjoyed.
Li Yi was not even in the mood to collect the unique spiritual herbs on the Taiyin Star and just wanted to return to Kunlun quickly.
Tongtian's understanding of formations had broken through, and the purpose of Li Yi and Tongtian's outing had been achieved. Both wished to return to Kunlun Mountain swiftly.
As Li Yi and Tongtian were hurrying back to Kunlun Mountain, they suddenly felt a surge of malevolent energy erupting from the west of the Primordial World.
Tongtian was greatly alarmed. He sensed danger from this malevolent energy and immediately asked, "Eldest Brother, do you feel it? What is this? This malevolent energy makes my spine tingle!"
Li Yi looked at Tongtian with complex emotions and slowly said, "The Four Immortal-Slaying Swords!"
Li Yi knew the power of the Four Immortal-Slaying Swords. Although he knew they were located in Mount Sumeru in the west and had intended to find a way to obtain them for Tongtian after returning, he did not expect them to fall into Rahu's hands.
Although the battle between Rahu and Hongjun was destined for Hongjun's victory, and his brothers and he would inevitably achieve sainthood without doing anything, Li Yi did not want to become Hongjun's disciple.
Originally, he had no intention of participating in the conflict between Hongjun and Rahu. Now, it seemed he had no choice but to go and acquire the Taiji Diagram, the Pangu Banner, and the Four Immortal-Slaying Swords along with the Immortal-Slaying Formation Diagram.
Tongtian wanted to ask more, but Li Yi interrupted him, "Third Brother, this world might not be peaceful for some time to come. We must return to Kunlun Mountain quickly."
Upon hearing his Eldest Brother's words, Tongtian abandoned his thought of investigating and nodded, saying, "As Eldest Brother says."
The two transformed into streaks of profound light and flew towards Kunlun Mountain.
Upon their return to Kunlun Mountain, Yuanshi had already finished his seclusion. Seeing his Eldest Brother and Third Brother return.
Just as he was about to step forward and inquire, Li Yi spoke first before Yuanshi could utter a word:
"A great calamity is about to befall the Primordial World. Second Brother, besides the Dinghai Pearls and the Three Treasures Jade Ruyi, you still lack a powerful offensive treasure. The Hongmeng Liangtian Ruler is perfect for filling this gap. Go into seclusion immediately and refine it. Third Brother, you should also quickly refine the Qiankun Yiqi Lock. I am going into seclusion!"
After speaking, and without waiting for Yuanshi and Tongtian to react, he had already vanished from Taiqing Peak.
Yuanshi was bewildered. Just as he was about to ask Tongtian, he heard Tongtian say, "When we returned, Eldest Brother sensed a surge of malevolent energy in the west. I asked Eldest Brother, but he didn't say much. Let's do as Eldest Brother instructed!"
Seeing that Tongtian also didn't know, and having personally felt the malevolent energy, Yuanshi knew the situation was serious from his Eldest Brother's hurried demeanor. He said no more.
Yuanshi and Tongtian each returned to Yuqing Peak and Shangqing Peak respectively.
In the west, on Mount Sumeru, four divine swords floated around Rahu.
After sensing Pangu's aura on Penglai Island, Rahu had returned to Mount Sumeru, fearing Pangu's pursuit.
Upon returning to Mount Sumeru, he belatedly realized that it couldn't have been Pangu. Pangu, as the God of Strength, could not have opened the heavens and earth if he were not dead, and the three thousand great daos would not have been perfected.
Those three Daoists must have found Pangu's inheritance, and the divine ability they used carried Pangu's aura.
Although Rahu guessed incorrectly, he was not far from the truth. The Three Pure Ones had indeed found Pangu's inheritance, but he did not know that the Three Pure Ones were actually transformed from Pangu's primordial spirit.
After returning to Mount Sumeru, Rahu went into seclusion to cultivate. Today, he suddenly felt a premonition from the depths of his being and wandered Mount Sumeru on a whim.
Unexpectedly, he sensed a surge of malevolent energy on the mountainside. Drawn by its aura, he found a supreme killing formation. Rahu expended considerable effort to break through the great formation.
As the great formation was broken, Rahu immediately felt a surge of malevolent energy soaring into the sky.
The moment Rahu broke the great formation, many powerful beings in the Primordial World also sensed the malevolent energy and invariably turned their gaze towards Mount Sumeru.
After the malevolent energy dissipated, Rahu saw four divine swords suspended in mid-air, all emitting faint traces of killing intent.
These four swords were formed from four fragments of Pangu's Heaven-Splitting Axe, which had absorbed the blood of numerous chaotic demon gods. Their offensive power was extraordinary. There was a poem that praised them:
Neither copper, iron, nor steel,
Hidden beneath Mount Sumeru they conceal.
Without the inversion of yin and yang in their forging,
How could they lack the quenching of fire and water for their edge?
Immortal-Slaying to slay immortals,
Trapping Immortal causing redness everywhere.
Absolute Immortal's changes are wondrous beyond compare,
Daluo Gods and Immortals will dye its robes with their blood.
Seeing the killing intent emanating from these four swords, Rahu was overjoyed. He knew that these four divine swords, like his own God-Slaying Spear, were supreme killing treasures.
Rahu was extremely excited. With these four divine swords, he had a greater chance of victory in his conflict with Hongjun.
He immediately took them into his possession, never expecting that such a treasure lay beneath his own dojo while he searched the entire Primordial World for it.
After collecting the Four Immortal-Slaying Swords, Rahu immediately returned to the summit of his dojo to refine them.
It took Rahu twenty thousand years to completely refine the Four Immortal-Slaying Swords.
After refining the Four Immortal-Slaying Swords, in order to maximize their power, Rahu spent another thirty thousand years devising a great formation, named the "Immortal-Slaying Formation."
He then spent another ten thousand years collecting materials from all over to forge an Immortal-Slaying Formation Diagram that would complement the Four Immortal-Slaying Swords and the Immortal-Slaying Formation.
Rahu tested it, and when the Immortal-Slaying Formation was deployed, its power surpassed that of his own God-Slaying Spear. Rahu was ecstatic, as if he could already see Hongjun bleeding within the Immortal-Slaying Formation.
After returning to Kunlun Mountain, Li Yi had been in seclusion the entire time. Yuanshi and Tongtian, after refining the Hongmeng Liangtian Ruler and the Qiankun Yiqi Lock, emerged from seclusion once. Upon seeing that Li Yi was still in seclusion, they returned to their own seclusions.
Rahu possessed the God-Slaying Spear and the Immortal-Slaying Formation for offense, the Twelve-Grade World-Destroying Black Lotus for defense, and his own formidable cultivation.
His confidence greatly increased, and he felt it was time to go to Jade Capital Mountain and send Hongjun to his demise.