The final stage required the Heavenly Demon to refine the wings with Demonic Flames for three days and three nights, systematically igniting and integrating the Asura King's power settled within them into the entirety of the wings. Simultaneously, Wang Lei needed to inscribe myriad wondrous formations onto the wings. Watching this, Lei Dong found it excruciatingly tedious and resorted to meditating nearby to circulate his Qi.

Three days later, Lei Dong opened his eyes, his entire being brimming with vitality. In contrast, the Heavenly Demon and Wang Lei appeared distinctly fatigued. Even with the power of a Nascent Soul cultivator, the Heavenly Demon’s True Essence was nearly depleted after continuously wielding the Demonic Flames for so long. After waiting for half a day, the final step finally arrived. Wang Lei sharply commanded Lei Dong: "Quickly, take advantage of this moment and refine it with your vital blood..."

Lei Dong dared not be careless for a moment, immediately mobilizing all his True Qi, squeezing his own blood vessels. As his vital blood surged to his cheeks, turning his face crimson, he spat out a stream of vital blood. It sprayed onto the wings with pinpoint accuracy. The pair of wings seemed almost alive, their surfaces churning as they absorbed Lei Dong's vital blood, weaving into finely discernible vein-like patterns.

"Not enough, continue," Wang Lei commanded again.

Lei Dong produced another stream of vital blood and spat it out, but Wang Lei still deemed it insufficient. Only after a full five jets of vital blood were expelled did the blood markings on the wings finally spread to every corner. The throbbing sensation gradually subsided. However, Lei Dong still could not rest. Under Wang Lei's guidance, he enveloped the wings with his divine sense and began the process of refining them slowly with the Heart Refining Technique. From this point on, neither Wang Lei nor the Heavenly Demon had any further role. They both sat down cross-legged, each swallowing a pill to begin recovering their strength.

Time trickled by. Lei Dong's expression was one of extreme resolve; the wings, as if possessing a spirit, constantly resisted his refinement. Yet, Lei Dong had already nourished these wings with his vital blood. In a sense, their bloodlines were already linked. Because of this, even though the wings resisted, the struggle was not overly violent. However, the primary material for these wings originated from the incomparably mighty Asura King. What status did the Asura King command? Even Nascent Soul cultivators only merited the qualification to grovel before it. How arduous then, was Lei Dong’s task to subdue the trace of the Asura King remaining within the wings, even if it was just a faint wisp of lingering will? Without paying such a heavy price in vital blood, Lei Dong would neither possess the qualification nor the opportunity to subdue these sentient wings.

Lei Dong directly swallowed a Cloud-Mist Returning Spirit Pill. One day passed, then two, until the third day. The resistance emanating from the wings grew increasingly faint, and they gradually began to resonate with his soul power. But Lei Dong remained unmoved, swallowing a final Cloud-Mist Returning Spirit Pill, continuing to refine them with his spirit. Fortunately, Lei Dong's soul power was far stronger than that of cultivators at the same level. Slowly, bit by bit, he finally brought the wings to obedience. From a single extension, they spanned several zhang wide, and gradually, he melted them step by step into his soul.

Once the integration was complete, Lei Dong collapsed onto the ground, his soul utterly weakened.

Yet, he could sense with absolute clarity: within his forehead, within his soul, a pair of semi-transparent small wings hovered, seemingly ethereal yet tangible, seemingly unsubstantial yet real. Beside them floated a small shield, a Crimson Flame Flying Sword gliding slowly like a spirit serpent, a Blood-Red Cloak stirring without wind, a slowly rotating Annihilation Dharma Wheel emitting a faint azure light, and a small black banner.

These were all magical artifacts or spiritual artifacts residing within Lei Dong's soul. However, whether it was the Crimson Flame Flying Sword, the Blood-Red Cloak, or the Annihilation Dharma Wheel, at this moment, they all seemed to regard those lovely little wings with profound reverence, keeping a wide berth and daring not approach them in the slightest.

He remained seated until he had recovered all his strength. Only then did Lei Dong rise. At the same instant, the Heavenly Demon and Wang Lei also opened their eyes, gazing at Lei Dong with a degree of anticipation. Wang Lei’s voice was somewhat hoarse, clearly not fully recovered, and he asked anxiously, "You, Lei fellow, did you succeed in the refinement..."

Lei Dong tentatively connected his divine sense to the wings lodged within his soul. With merely a thought, the wings materialized on his back out of thin air. Whatever technique Wang Lei had employed, the wing roots appeared both solid and illusory, piercing seamlessly through the pitch-black battle armor, the inner armor, and his underclothes. They seemed naturally fused into his back, as if they had grown there. When Lei Dong's thoughts shifted slightly, the wings suddenly flapped once.

His body shot forward like a cannonball fired from its chamber, rocketing away with a whoosh. Caught completely off guard, Lei Dong tumbled uncontrollably in the air like a gourd, colliding and scraping violently against the air, barely possessing the strength to open his mouth. However, the entire event lasted only an instant. When Lei Dong finally managed to stop himself awkwardly and quickly mobilized his true energy to stabilize in mid-air, he looked back and was stunned to find himself already two or three li away from the isolated island.

He froze on the spot, utterly bewildered. How was this possible? To travel so far in a single instant? Even at his peak speed bursts, going dozens of zhang in one breath was the utmost limit. But now, he felt a considerable drain; of the once full reserves of True Qi in his body, less than a tenth had been consumed in that instant.

Wang Lei was already rocketing towards him. The Heavenly Demon, however, appeared beside Lei Dong with uncanny speed. Even the Heavenly Demon stared at Lei Dong's back with immense surprise—at the pair of wings that were instinctively flexing and contracting slowly in a mysterious rhythm—and said in a voice slightly low and rough, "These wings look quite extraordinary. In that single moment just now, you covered at least three li. Lei Dong, how fast can you normally fly?"

"At my fastest burst, I can reach two thousand li per hour," Lei Dong replied with a wry smile. "If converted, that instant should have been equivalent to about forty to fifty zhang. Of course, that requires a tiny bit of time to accelerate." Three li was equivalent to five hundred zhang. This instant speed was almost ten times his fastest recorded speed.

Wang Lei also flew up to Lei Dong’s front, gazing at him in astonishment and clicking his tongue. "This speed is too exaggerated. While Asuras are naturally skilled in speed, these Asura King wings are truly too formidable."

"High speed comes with high consumption," Lei Dong shook his head with resignation. "At this rate, I can manage maybe a dozen bursts before all my True Qi is exhausted."

The Heavenly Demon pondered for a moment. "Lei Dong, try again."

In front of others, Lei Dong was exceptionally respectful towards the Heavenly Demon. "Yes, Hall Master," he replied politely. With that, he composed himself this time and touched the wings with his mind, personally feeling the immense propulsive force generated when they flapped. This time, Lei Dong’s reaction was much better than the surprise of the first attempt. Although he still tumbled two or three times, his posture was considerably more graceful. After several successive flights back and forth, Lei Dong gradually acclimated to this terrifying velocity, beginning to learn how to lower his body to reduce resistance, enabling him to fly farther and faster. Although his posture remained somewhat unstable during flight, it was far superior to the first time. The speed of his dashes was also slightly greater. After repeating the test several times, Lei Dong finally stopped before the Heavenly Demon and cupped his hands in salute.

"This speed is comparable to an ordinary early-stage Nascent Soul cultivator. But the problem is sustainability. Thus, if you encounter a Nascent Soul cultivator intent on killing you, escaping might still be difficult," the Heavenly Demon stated after careful consideration. "However, with these wings, your chances of escaping from a Golden Core early-stage cultivator will increase dramatically, unless the opponent possesses an equally monstrous artifact. Even more valuable is that these wings will allow you to attain faster and more sustained effects as your cultivation advances—excellent, truly excellent."

Lei Dong’s face was serious, though inside, he was nearly laughing out loud. Faster and more sustained—but as long as this item allowed him to escape the pursuit of Golden Core cultivators, it was enough, everything was enough. He couldn't genuinely rely on it to escape a Nascent Soul cultivator, could he? After all, in a certain sense, Nascent Soul cultivators were exceptionally rare; it was difficult to encounter even one. If such a calamity occurred, it could only be attributed to fate.

"Lei kid, enough talk. We might as well test it out. If you can still escape while I am exerting my full power and successfully evade my tracking," Wang Lei was also greatly pleased with the wings and couldn't resist testing their practical combat utility. The Blood-Red Cloak was originally a spiritual artifact he considered quite successful in his artifact refining career. But if this item could help Lei Dong escape Golden Core cultivators, it would become the proudest creation of his life.

Just as Lei Dong was about to request a short rest, he heard Wang Lei shout, "Watch out!" With that, Wang Lei conjured a cyan giant claw, nearly ten zhang long, and lunged at him fiercely, its claw-winds sharp and its aura imposing.

If he were caught by that strike, he would likely lose half his life even if he didn't die. He frantically flapped his wings, shooting away like a bolt of lightning several li into the distance. Wang Lei also exploded into motion, chasing him at an extremely rapid pace. Lei Dong dared not linger and continued to flash his wings. Boom, boom, boom. He flashed his wings three times consecutively. By the time he stabilized himself in mid-air, Wang Lei's trace had already vanished behind him. A surge of exhilaration swept through him; these wings, refined from the Asura King’s wings, were truly as fast as lightning. However, he knew that relying on just a couple of flaps to evade a Golden Core pursuer was impossible. Lei Dong dared not be careless, swallowing a small Cloud-Mist Returning Spirit Pill and desperately flapping his wings. The wings, in turn, acted like a juicer, frantically wringing out Lei Dong's last wisps of True Qi.