The moment the Demonic Blazing Palm manifested, a ferocious surge of demonic aura flooded heaven and earth and swallowed Liu Wuxie, tearing his domain apart in an instant. The power truly befitted an immortal, and that momentum rolled out in waves as it shredded Liu Wuxie's domain with ease.

"Brat, you can die now!" the one-armed man said, letting out a sinister laughter as if he already saw Liu Wuxie crushed under his palm. The power of an immortal and an immortal art wasn't something a mere mortal could contend with.

"You dare to use such garbage as immortal art?" Liu Wuxie sneered.

His domain breaking apart didn't mean he had lost the ability to resist.

He lifted his right hand, and the five elements spun at once, converging into a divine palm that hung across the sky. The power of the five elements formed into a cycle, casting a shadow across Nightmare City.

"How is it possible that a mere cultivator at the Heaven Gaze Realm knows how to wield an immortal art?!" Horror flashed through the one-armed man's eyes.

With Liu Wuxie's cultivation only at the fourth-level Heaven Gaze Realm, he controlled the immortal art even more smoothly than before. It looked as though he had tempered the immortal art for countless years.

"You're nothing but a frog at the bottom of a well. Let me show you what real immortal art looks like!" Liu Wuxie mocked as the Great Five Elemental Immortal Art slammed down from the sky.

As the attack fell, it blasted apart the blazing heat in the air, and the one-armed man's domain shattered as well. Terrifying laws at the Immortal Realm surged through the surroundings, and a black hole appeared to devour every last strand of law.

This was definitely the first in this lifetime that he had slain an immortal, albeit the opponent only being a projection. Even so, that achievement alone could carve a new chapter into history.

Over a million years, no human cultivator at the Heaven Gaze Realm had ever slain an immortal.

The Demonic Blazing Palm crumbled, reduced to dust beneath Liu Wuxie's power.

For the first time, fear flickered in the one-armed man's eyes. Had he been present in person, he would not have feared Liu Wuxie and might even have slain him. But this projection carried only a third of his true strength and was merely slightly stronger than a quasi-immortal, making it difficult to kill Liu Wuxie.

"Brat, I will kill you!" the one-armed man roared, madness twisting his face.

Greed also flashed across his face when he saw Liu Wuxie's mastery of immortal arts at such a young age. The Great Five Elemental Immortal Art terrified him, yet it also ignited that greed in his heart.

He felt that if he seized that palm technique, he could sweep through the Indigo Bamboo Astral Domain unrivaled once he left seclusion. By then, even cultivators at the second-level Heavenly Immortal Realm wouldn't be his match.

The Great Five Elemental Immortal Art and the Demonic Blazing Palm detonated together, bursting into endless ripples that roared outward.

Cracks spread along the buildings on both sides of the street, straining the Nightmare City.

Liu Wuxie knew he had to finish this quickly because every new fissure would cost him time and countless resources to repair. He moved first and attacked aggressively, leaving the other party no room to act, and this time, the Great Five Elemental Immortal Art carried far more force than before.

The one-armed man didn't dare to underestimate Liu Wuxie, so he unleashed another immortal art while he traced a circle through the air.

"Rainbow Blood Slash!" A razor-sharp blade ray dropped from the sky, and cracks immediately spread across the Great Five Elemental Immortal Art as the two immortal arts collided evenly.

Liu Wuxie's combat strength was slightly above that of a quasi-immortal, yet he still fell just short of truly contending with immortals. This became the perfect chance to temper himself, and he could use the one-armed man to temper his immortal arts.

An invisible palm crushed the Rainbow Blood Slash, and the resulting shockwave swept out as Nightmare City trembled even more violently.

Liu Wuxie pressed his advantage and cast the Heavenbound Immortal Finger, summoning a colossal finger that stood proudly in the sky. The instant it appeared, the one-armed man's eyes shook again.

"Y-You actually know two immortal arts?!" the one-armed man exclaimed, no longer able to keep his composure.

One immortal art already left him shaken, and the second shattered his understanding completely. He even began to wonder if Liu Wuxie had once been an immortal.

That was obviously not the case, and Liu Wuxie's cultivation wouldn't lie. The one-armed man could clearly sense Liu Wuxie at the fourth-level Heaven Gaze Realm.

"Surprised?" Liu Wuxie mocked, and he didn't pause for even a breath as the Heavenbound Immortal Finger continued its descent.

The one-armed man only knew two immortal arts, and he had already used them. With one hand, he hurriedly formed seals to drive the Demonic Blazing Palm up against the Heavenbound Immortal Finger.

The collision shattered space across a three-thousand-meter radius. Even the homes of the evil spirits collapsed into the ground.

Countless evil spirits hovered in the sky, watching the battle unfold.

The evil spirits said as they gathered to discuss the fight, "Liu Wuxie is too terrifying to be able to contend against an immortal!"

"Kill Liu Wuxie already! That way, we can return to Nightmare City," said an evil spirit at the Heaven Gaze Realm.

With the Evil Spirit King dead alongside countless elites, he had become the new king.

"We can't go back anymore. Even if Liu Wuxie dies, that one-armed man will seize Nightmare City. He was the one who chained it down with the Seven-Fiend Netherworld Chains in the past," said an elderly evil spirit with his face twisted with ferocity.

As the evil spirits argued among themselves, the Heavenbound Immortal Finger crushed the Demonic Blazing Palm, yet the finger didn't stop and continued to drop from the sky.

"This is impossible! How can the immortal runes in your immortal art be so powerful?!" the one-armed man exclaimed, unable to accept the outcome as he began inscribing runes with a single hand and prepared to unveil his trump card.

"You think inscribing immortal runes now can turn the tide around?" Liu Wuxie mocked, and sheer fury made the one-armed man's inscribing speed falter. That mind game worked too well, and the Heavenbound Immortal Finger slammed down in that tiny instant of hesitation.

The one-armed man flew back from a single strike, and his projection began breaking apart as the aura it radiated weakened.

"You actually injured me?!" The one-armed man glared, rage burning in his eyes as he charged at Liu Wuxie and tried to take him down. He would lose only his projection, but Liu Wuxie would die for real.

"This game ends now," Liu Wuxie said.

He didn't want to prolong the fight, as he had already grasped the basic combat strength of the Indigo Bamboo Astral Domain's immortals.

Even with his current strength, defeating someone at the first-level Heavenly Immortal Realm wouldn't be easy unless he reached the sixth- or seventh-level Heaven Gaze Realm. He had only half a year left, and he had to seize every possible chance to raise his cultivation.

Even the Heavenly Dragon Sect couldn't help him anymore, and from this point on, he could only rely on himself.

Treasures were limited, and if he depended on his own comprehension alone, it would be impressive if he could break through even one level in six months.

Thus, he raced against time, and that urgency was why he had come to collect Nightmare City. He had to upgrade it to an immortal art before the immortals returned, and if he could combine it with his combat strength, slaying an immortal wouldn't be impossible.

Before the one-armed man could even recover, Liu Wuxie had already released his third immortal art.

"Divine Eternal Fist!" When the Divine Eternal Fist appeared, the one-armed man froze on the spot, unable to react in time.

"Are you a human, or are you a monster?" the one-armed man asked, stunned beyond measure that Liu Wuxie could master two immortal arts, yet now he wielded a third.

If he knew that Liu Wuxie also wielded the Nine Absolute Fists, he would probably faint from sheer anger.

The Divine Eternal Fist rumbled across the sky with terrifying momentum, standing as Liu Wuxie's strongest immortal art aside from the Nine Absolute Fists.

Immortal energy surged out of the desolate world, and a hint of astral domain force empowered it, further boosting the Divine Eternal Fist's might.

"I can't accept this! I won't accept this!" the one-armed man cried as the suppression locked him down. The power of eternity could plunge everything into eternal stillness.

He could only watch helplessly as the Divine Eternal Fist descended from the sky. None of his immortal arts worked on Liu Wuxie, and no one understood immortal arts better than Liu Wuxie. The only thing that held him back was his cultivation.

"This ends now!" Liu Wuxie said, his face devoid of emotion as he declared the one-armed man's death.

The fist pierced through the sky, punched through space, and tore straight through the one-armed man's projection. This time, the projection didn't recover at all and shattered completely, releasing countless laws of the Immortal Realm into the surroundings.

Immortal Realm laws had condensed the projection, making it priceless.

"Let's inject them into Nightmare City," Liu Wuxie said. He didn't collect them himself; instead, he planned to use them to speed up the city's refinement.

With the support of the immortal runes, Nightmare City shrank rapidly as he refined parts of it. When his will as an Immortal Emperor crushed down, the artifact spirit could only obey after he subdued it, and with the artifact spirit's help, controlling Nightmare City became much easier than before.

"Just you wait! When I return to the astral domains, I will make sure to kill you," the one-armed man's lingering will said after his projection shattered.

"I'm looking forward to it," Liu Wuxie replied coldly.

If the one-armed man truly came and Liu Wuxie managed to kill him, there would be a high chance he could borrow an immortal's body to break through into even higher levels of cultivation. Then again, no one would dare to imagine refining an immortal's body as a mortal.

Immortals represented the supreme existences in the four astral domains, and it was already blasphemy to stare at them, let alone refine them.

Liu Wuxie threw himself into refining Nightmare City, and the pace rose even faster than before.

"Master, many places got damaged, and we need a large amount of materials to repair them," the artifact spirit said, now that Liu Wuxie had subdued it.

Liu Wuxie immediately produced a large amount of materials, melted them down, and injected them into Nightmare City. Then he turned his gaze to the Seven-Fiend Netherworld Chains and planned to use them to repair every bit of damage to Nightmare City.

The Seven-Fiend Netherworld Chains finally couldn't endure the force any longer and tore free from the mountains and shot straight toward Liu Wuxie.

"Hmph. Do you think you can kill me by controlling the Seven-Fiend Netherworld Chains?" Liu Wuxie snorted. The one-armed man had refined the chains, so they carried his will, and it wasn't strange that he could control them from afar.

With a single palm strike, Liu Wuxie forced the Seven-Fiend Netherworld Chains to submit immediately. He then inscribed artifact runes into the chains, refining them with countless rare materials.