Lin Xuan was also pale. With his exceptional soul power, he could naturally sense the terror of that flame space.

The flame domain gave him an extremely creepy feeling.

"A domain, also known as the King Domain, is a method acquired only after entering the King Realm."

"A Venerable cultivates a martial soul as an energy source, while a king cultivates a domain, using the domain as an energy source."

"The King Domain is developed from the martial soul to form an independent domain where the opponent's combat power can be multiplied."

The explanation from the Dark Red Divine Dragon shocked Lin Xuan. He realized this domain was akin to a small independent space.

Of course, it had not yet become a true space, but it was still incomparably terrifying.

Once trapped in the opponent's domain, one would likely only face annihilation.

"Kid, to die beneath my Netherworld Demon Flame Domain is enough for you to be proud!"

The Heavenly Nether Bird's voice was cold and, around him, countless black flames formed a unique domain, like hell, terrifying beyond measure.

The next moment, his massive form rushed forward, carrying the Netherworld Demon Flame Domain, and charged toward Lin Xuan.

The power of that domain was simply too terrifying, shattering the entire void wherever it passed.

It could be said the domain contained the energy essence of a king, exceptionally strong, and a martial artist in the Venerable Realm could not possibly resist.

Facing the King Domain of the Heavenly Nether Bird, Lin Xuan's expression was exceptionally serious.

The Azure Pine Sword only had one last bit of energy left, and he had to strike with certainty. Without the Azure Pine Sword, he simply couldn't contend with the king-level Heavenly Nether Bird.

Watching the approaching Heavenly Nether Bird, Lin Xuan took a deep breath and slowly raised the Azure Pine Sword.

"Haha, it's useless. You can't break through my King Domain at all."

The Heavenly Nether Bird sneered, "Soon I'll show you what is hell!"

"Damn it, kid, why don't we leave? Don't fight him. This guy can wield a King Domain; his combat power is absolutely extraordinary!"

The Dark Red Divine Dragon also looked grim.

However, Lin Xuan shook his head decisively. In the current situation, he had to keep fighting. There was still a slim chance of survival in battle, but running away meant certain death.

Staring at the approaching Netherworld Demon Flame Domain, Lin Xuan's sword soul erupted in dazzling light.

The next moment, he was about to strike with his longsword, but at that moment, a deep sigh came from the void.

Sigh!

This voice was low yet incredibly clear, and its appearance caused the entire Azure Pine Hall to tremble violently.

Even the Heavenly Nether Bird flying ahead suddenly stopped, his face full of terror, as though he'd seen a ghost.

"Damn it, who are you? Get out here!"

The Heavenly Nether Bird seemed provoked, roaring in anger, causing the entire void to boil and rouse a storm of air waves.

Even Lin Xuan's arm halted mid-air. He could clearly hear that the sigh came from within the Azure Pine Sword.

"Could it be?"

Lin Xuan slowly lowered his arm, looked at the Azure Pine Sword in his hand, his face filled with uncertainty.

And then, that deep voice spoke again, "Tian You, I never thought after a few thousand years, you actually emerged."

Upon hearing this voice, the Heavenly Nether Bird's feathers bristled instantly, and he screeched in terror, "Old Man Cang Song, how is this possible? Aren't you already dead!"

Humans are different from demon beasts. Demon beasts have long lifespans, so living for thousands of years is no problem.

But humans, even at the King level, only live for two or three thousand years at most, any longer would be impossible.

Therefore, although the Heavenly Nether Bird was no match for Daoist Cang Song, he was still alive until now, while the other party was supposed to be dead.

"Impossible, Old Man Cang Song couldn't possibly live this long!"

"Who the hell are you, pretending to be a ghost, get out here!"

"Back then, it was because you were too ferocious that I sealed you. I didn't expect that after these thousands of years, not only did it not erase your ferocity, it actually made you more unrestrained."

"You truly wasted all my efforts."

That deep voice echoed again, and then from the Azure Pine Sword, a pale figure leisurely floated out.

It was an old man, hair and beard all white, wearing a Daoist robe, exuding an ethereal and immortal aura.

"Old Man Cang Song, it's really you!"

Upon seeing that illusory figure, the Heavenly Nether Bird finally screamed uncontrollably.

His eyes were full of fear and dread, "Damn Old Man Cang Song, you actually dared to seal me for thousands of years. This time, I will definitely destroy your lair."

Saying this, the Heavenly Nether Bird let out a cold snort, and the surrounding Netherworld Demon Flame Domain ignited fiercely once again,

carrying the King Domain, he charged toward Lin Xuan with a more violent posture.

Feeling this surge of energy, Lin Xuan's scalp went numb, while the pale figure in front of him merely sighed.

Then, with a grasp, the Azure Pine Sword in Lin Xuan's hand flew out and landed in the old man's hand.

The next moment, the Azure Pine Sword erupted with dazzling light, like a green sun shining all around.

An astonishing aura burst out from that longsword.

This sword qi was terribly frightening, and just its aftermath caused a great rift to appear in space, several miles long.

Old Man Cang Song held the Azure Pine Sword in one hand and swiftly slashed out a sword qi.

The sword qi stretched several thousand feet long, as if a green dragon roaring in the air.

This sword directly slashed toward the Heavenly Nether Bird, harshly striking upon the Netherworld Demon Flame Domain in front of him, and an earth-shattering explosion resounded.

The Netherworld Demon Flame Domain was ruthlessly torn open, revealing a terrifying rift.

The Heavenly Nether Bird was further impacted, his vast, mountain-like form knocked back.

"Damn it, this is impossible. You're just a remnant soul, how could you possess such powerful strength."

The Heavenly Nether Bird went mad, unable to believe it.

That sword just now was terrifying, nearly splitting open his Netherworld Demon Flame Domain.

Although over these thousands of years his strength had greatly diminished from his peak, it was still not something anyone could break through his domain.

Moreover, the other party was just a remnant soul shadow of Old Man Cang Song, hardly able to exert much power.

Old Man Cang Song was equally astonished. He looked at the Azure Pine Sword in his hand, his gaze flickering intensely.

"What a powerful sword soul aura, truly rare in this world."

"Young man, is this your sword soul?"

Old Man Cang Song looked at Lin Xuan.

"Greetings, senior, that is indeed my sword soul." Lin Xuan answered truthfully.

"Not bad, not bad, the youth is to be feared. Such a fierce sword soul, even I never had in my prime."

"Young man, your future is boundless!" Old Man Cang Song praised.

"Senior overpraises me."

Lin Xuan and Old Man Cang Song conversed over there, while on the other side, the Heavenly Nether Bird was going crazy with rage.

Since breaking the seal, nothing had gone smoothly for him.

Now even the remnant shadow of Old Man Cang Song had appeared, which made him extremely uneasy.

"Old fool, you're nothing but a remnant clone shadow, incapable of exerting much strength. Once I destroy you, I'll raze your entire Azure Pine Hall!"

"I see who in heaven or earth can stop me!"

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