Immortality and cultivation begin with full comprehension.

Chapter 400 Slaying the Demon King
As the battle continued, both sides paid a heavy price.

Countless corpses of sea monsters floated on the sea surface, their blood staining the seawater red.

The cultivators also suffered many casualties, but under the leadership of the "Holy Sound Sect," they still held their ground on "Mist Hidden Island" without any intention of retreating.

Just then, a commotion suddenly broke out behind the sea creatures.

Looking around, Li Yunjing saw a huge sea beast slowly emerging from the water.

This sea beast was larger than any of the monsters that had appeared before, and it exuded a powerful aura.

The appearance of the third-tier demon king made the atmosphere on the battlefield even more tense.

It opened its blood-red maw and spewed out jets of black water, tearing many cultivators to shreds wherever the water jets reached.

"Oh no! This sea monster is too powerful! We must find a way to stop it!"

Within the "Holy Sound Sect," a monk shouted loudly.

Just when everyone was feeling hopeless, the Golden Core elder of the "Holy Sound Sect" finally made his move.

He flew out from the ranks of the "Holy Sound Cult," dressed in a long golden robe.

This person exuded a powerful aura that caused the surrounding air to tremble.

"Hmph, Xuan Turtle Demon King, how dare you run wild on the territory of my Holy Sound Sect!"

The elder snorted coldly and quickly formed hand seals.

A golden flute appeared in his hand.

The flute was played immediately.

"Boom!"

A series of loud bangs and a sound wave emanated from the flute.

The air was trembling, and the waves split in two!

Many demonic beasts were unable to dodge in time and were struck by the invisible sound waves, turning into a bloody mist.

These monsters were actually cut into pieces by the sound waves!
Even the Xuan Turtle Demon King's body was constantly exploding.

The powerful impact sent the Xuan Turtle Demon King flying dozens of feet away. However, this demon king had thick skin and a tortoise shell protecting its body, so it did not suffer any injuries.

"What amazing sonic power!"

Seeing how powerful the elders of the "Holy Sound Sect" were with their sonic abilities, Li Yunjing couldn't help but feel a little tempted.

In terms of sonic techniques, he did not learn any powerful skills at the "Shenxiao Dao Sect".

The Nine True Words of Xuanmen, along with other sonic techniques, are treasures of the "Shenxiao Dao Sect".

Li Yunjing can't afford to exchange it!

Many traditions originate from the gods and immortals in heaven!

If Li Yunjing wants to learn, he needs to make a huge contribution to the "Shenxiao Dao Sect"!

With the intervention of the "Holy Sound Sect" elders, the situation became evenly matched once again. Li Yunjing continued to charge ahead, targeting the most powerful second-tier demonic beasts.

"Roar……"

Before long, the Xuan Turtle Demon King let out a painful roar. It had obviously not expected that the sonic attack could break through its defenses.

In this confrontation, the demon king was at a disadvantage!

Sound wave power is inherently an unorthodox supernatural ability.

The "Holy Sound Sect" specializes in sonic techniques, making them fearless against powerful monsters, and they are practically the nemesis of such monsters!
"Everyone, attack with all your might now!"

The elder of the "Holy Sound Sect" shouted loudly when he had a spare moment.

Clearly, relying on sonic power has taken a huge toll on him.

"kill!"

The crowd responded enthusiastically, unleashing their strongest spells and techniques as they attacked the Xuan Turtle Demon King.

In an instant, various lights intertwined, illuminating the entire battlefield as if it were daytime.

Although the Xuan Turtle Demon King was powerful, he was gradually unable to withstand the onslaught from the crowd.

Its body was covered in wounds, and blood kept flowing from the wounds, staining the surrounding seawater red.

A hint of fear flashed in its eyes, and it began to sink into the sea.

As long as it enters the deep sea and is not disturbed by sonic attacks, this demon king can recover again!
With a "plop," Li Yunjing jumped into the sea!

Taking advantage of the Xuan Turtle Demon King's injury, Li Yunjing prepared to kill it!
It is well known that in the world of cultivation, turtle-type demonic beasts are famous for their long lifespan.

Especially this third-tier demon king, it's practically a great tonic.

No matter what, Li Yunjing could not let this demon king go!

Li Yunjing leaped into the sea, his body diving swiftly like a fish, heading straight for the wounded Xuan Turtle Demon King.

"Boy, you still dare to chase after me?"

Although the Xuan Turtle Demon King was seriously injured, it was still a third-tier demon beast and its strength should not be underestimated.

The demon king, sensing Li Yunjing's pursuit, suddenly swung its tail, stirring up a huge undercurrent that threatened to tear Li Yunjing to pieces.

"Even if you were unharmed, you might not be my match, let alone if you were seriously injured!"

Li Yunjing snorted coldly, circulating his true essence within his body. The dark currents couldn't shake him at all, and he quickly approached the Xuan Turtle Demon King.

Li Yunjing made a hand seal, unleashing his full power of thunder, which entered the "Yin Yang Five Elements Heavenly Evolution Sword." A fierce "Gui Water Divine Thunder" struck towards the Xuan Turtle Demon King.

"Boom!"

At this moment, Li Yunjing's "Gui Water Divine Thunder", with his own thunder power and the blessing of the "Yin Yang Five Elements Heavenly Evolution Sword", is more than ten times more powerful than the previous "Gui Water Divine Thunder"!
This "Gui Water Divine Thunder" is enough to kill a Golden Core cultivator!
The massive explosion was even more powerful in the ocean, tearing the two pieces of the tortoise shell apart!

"what……"

The intense pain caused the Xuan Turtle Demon King to let out a low roar.

The Xuan Turtle Demon King suddenly turned around, no longer fleeing downwards, but instead opened its blood-red maw and bit at Li Yunjing.

The injury wasn't fatal, but it thoroughly enraged the demon king!

He was injured by a mere ant in the Foundation Establishment stage!

The Demon King's pride compels him to kill this ant!
"hey-hey!"

Li Yunjing sneered, already prepared, and dodged the attack with a swift movement.

He changed his hand seals again, and another "Gui Water Divine Thunder" blasted towards the Xuan Turtle Demon King.

"Boom!"

The Xuan Turtle Demon King was enormous, comparable to a small mountain, and had no way to dodge it. It was struck by lightning again, letting out a shrill scream. Its huge body struggled violently in the sea, and its blood stained the nearby waters red.

"Explode! Explode! Explode!"

Li Yunjing gave the Xuan Turtle Demon King no chance to breathe, his hands moving rapidly, unleashing streams of "Gui Water Divine Thunder" through the "Yin Yang Five Elements Heavenly Evolution Sword".

It crashed down on the Xuan Turtle Demon King like a violent storm!
The Xuan Turtle Demon King fought desperately, but under Li Yunjing's fierce attack, it finally couldn't hold on. Its huge body was blown to pieces, and its massive tortoise shell was completely disintegrated.

"Finally solved!"

Li Yunjing breathed a sigh of relief, feeling a sense of ease.

He quickly swam to the corpse of the Xuan Turtle Demon King and began to dissect the third-tier demon king with the "Yin Yang Five Elements Heavenly Evolution Sword".

The Xuan Turtle Demon King is a treasure trove, especially its inner core and carapace, which are excellent materials for refining magical artifacts and elixirs.

Even the flesh and blood are top-notch ingredients.

Li Yunjing carefully divided everything about the Xuan Turtle Demon King into individual parts and put them into various treasure pouches.

After finishing these tasks, Li Yunjing was about to leave when he suddenly noticed a faint light flickering on the abdomen of the Xuan Turtle Demon King.

Li Yunjing's heart stirred, and he used his supernatural powers to sense that he had discovered a storage space!
"This is... the storage space inside the Xuan Turtle Demon King's body!"

A hint of surprise flashed in Li Yunjing's eyes.

Some powerful demon kings are born with a mastery of spatial laws and can create a storage space within their bodies, similar to the storage treasures of humans.

This demon king actually possesses such abilities!
Li Yunjing's figure immediately descended towards the seabed. At the same time, his "Creation Divine Eye" opened to explore the secrets of this ball of light, trying to break through the space and retrieve the treasure of the Xuan Turtle Demon King.

The "Eye of Creation" kept scanning, and the changes in space were clearly revealed in its eyes.

"Chichichi..."

Li Yunjing made a series of moves, and with a "crack," the internal space was finally opened.

Looking around, Li Yunjing's eyes widened in astonishment. This third-tier demon king possessed a massive amount of resources.

Inside the Xuan Turtle Demon King's body, besides a vast amount of second- and third-tier natural treasures, there was also a large number of spirit stones!
The number of low-grade, mid-grade, and high-grade spirit stones was extremely abundant. Among the many spirit stones, Li Yunjing even found a water-attribute spirit stone with extremely rich spiritual energy!
That's a top-grade spirit stone!
Top-grade spirit stones are not just ordinary spirit stones. Besides their function as currency, they can be used in every aspect of cultivation!

Such precious spirit stones are something even Nascent Soul cultivators are reluctant to use easily. It is said that only those at the Divine Transformation Realm and above can use them for cultivation!

"Great! Excellent! This time, we've hit the jackpot!"

Li Yunjing carefully placed the precious materials and spirit stones into his storage ring. After completing this, Li Yunjing quickly surfaced and returned to the Emerald Coral Reef.

At this moment, the battle intensified, and third-tier demon kings continued to converge on this place.

Without opening the eastern gate of "Holy Sound Island," it would be impossible to attack the main island. The killings became increasingly intense, seemingly with no possibility of stopping!

Hundreds of thousands, millions, or even tens of millions of monsters swarmed in.

Especially in the sky, a large number of flying demonic beasts were swooping down on the cultivators below.

On the vast East Sea, besides the sea creatures, there are also avian creatures and even land-based demons. These demons have joined forces to launch a simultaneous attack on "Mist-Hidden Island".

"Chirp..."

Just as Li Yunjing returned to the coral reef, a fierce cry from a bird, like a thunderclap, exploded in his ears!

In Li Yunjing's eyes, a huge black demonic bird was rapidly swooping down, bringing with it a fierce wind that seemed to tear apart all of space!
This is a third-tier demon king, a hundred feet in size. Its golden feathers are like those cast from Geng metal, with a cold metallic luster. Its huge claws are as big as houses, and its sharp claws are comparable to divine weapons!

"so close!"

This demonic bird was too fast, and Li Yunjing instinctively dodged its attack!

In an instant, the coral reef where Li Yunjing had just stood was crushed to pieces like tofu by the demonic bird's claws!
No matter what kind of restrictions are placed, they cannot protect this fortress!
"Kid! Where's the Black Tortoise?"

The golden eagle's divine sense spread out, its eyes were blood red, cold and brutal, making it a first-class raptor among birds!
Golden Eagle's gaze is extremely sharp; it can see through everything.

When Li Yunjing chased after the Xuan Turtle Demon King, the Golden Eagle King saw it all clearly.

Now that this brat Li Yunjing has emerged, carrying the bloody scent of the Xuan Turtle Demon King, the Golden Eagle King has bad associations with him, which is why he attacked Li Yunjing.

Otherwise, this demon king wouldn't have gone so far as to attack a mere ant at the seventh level of the Foundation Establishment Realm.

"you guess!"

Being ambushed as soon as he emerged, Li Yunjing was furious and naturally didn't give the demon king a friendly look, nor did he answer the demon king's question.

"court death!"

The Golden Eagle King was furious. With a flap of its wings, it reached a full three hundred feet!

The entire "Emerald Coral Reef" has collapsed.

"call……"

With a flap of its wings, the Golden Eagle King unleashed a powerful gust of wind and swooped down once more. All the cultivators around, except those who had escaped beforehand, were torn to pieces in the hurricane.

The entire "Emerald Coral Reef" has collapsed and completely disappeared below the sea surface.

Only Li Yunjing stood in mid-air, wielding the "Yin Yang Five Elements Heavenly Evolution Sword," showing no fear as he prepared to meet the Golden Eagle King's sharp claws!
"Dangdang..."

With two loud bangs, the Yin-Yang Five Elements Heavenly Evolution Sword and the Golden Eagle King's two claws collided heavily.

Mars is surging everywhere!
Even the "Yin Yang Five Elements Heavenly Evolution Sword" failed to cut off the Golden Eagle King's claws!
These claws are truly comparable to divine weapons!

"Good guy!"

Li Yunjing's arm trembled violently, and his tiger's mouth went numb. He almost lost his grip on the "Yin Yang Five Elements Heavenly Evolution Sword" and it flew away.

Fortunately, Li Yunjing remained calm and jumped into the sea immediately.

Bird-like monsters generally dislike seawater and are unwilling to enter the sea, which is Li Yunjing's opportunity!
This demon king is far more powerful than the Xuan Turtle Demon King.

In this chaotic battlefield, Li Yunjing had no need to reveal his true combat strength.

In the territory of the "Holy Sound Sect," even if the sky falls, there are tall people to hold it up. In any case, it is not Li Yunjing's place to show off his power here.

"You little beast! You think that just because you jumped into the sea, I won't dare to chase you?"

Seeing that the other two demon kings were blocking the elders of the "Holy Sound Sect", the Golden Eagle King folded his wings and followed Li Yunjing, plunging into the sea!

"Gudong Gudong..."

Just three miles into the sea, I felt a massive killing intent approaching from behind!

Li Yunjing was startled, turned around, and suddenly turned to face the Golden Eagle King who was chasing after him!

In the sea, the Golden Eagle King's strength was greatly reduced.

There were no other cultivators around, so Li Yunjing was determined to fight.

"Boom!"

Li Yunjing wielded the "Yin Yang Five Elements Heavenly Evolution Sword" in one hand and unleashed the "Five Elements Divine Fist" he had just developed in the other!
This fist technique, based on his own understanding of the Five Elements, is a fusion of metal, wood, water, fire, and earth, representing the five vital energies. It is fierce, domineering, and powerful enough to be considered Li Yunjing's masterpiece of fist techniques!

"Ouch..."

Little did the Golden Eagle King know that Li Yunjing's explosive power was so strong.

It had just blocked the attack of the "Yin Yang Five Elements Heavenly Evolution Sword" when it was struck in the abdomen by the "Five Elements Divine Fist". The feathers, which were as black as metal, exploded in the abdomen and fell into the sea, scattering everywhere.

The golden eagle king let out a piercing scream, a painful and ear-piercing sound that almost shattered Li Yunjing's eardrums!

"Good heavens! This demon king is also proficient in sonic attacks!"

Li Yunjing felt like his brain was about to explode, so he quickly shut off his hearing, which made him feel much better.

"Bang! Bang! Bang!"

Having already closed in on his opponent, Li Yunjing unleashed a barrage of punches, the "Power of the Five Elements" erupting from his fists, also carrying the power of "Five Elements Divine Thunder"!

"Boom!"

After being punched three more times, Golden Eagle King's abdomen collapsed and then split open, revealing a huge hole punched in it by Li Yunjing's fist, from which blood gushed out.

"Ah...you little beast...you actually injured me..."

The Golden Eagle King let out a miserable cry, unable to resist trying to escape, leave the sea, and return to the sky.

At this moment, Golden Eagle King wanted to leave, but Li Yunjing did not give it the chance.

Li Yunjing flipped over and mounted the Golden Eagle King's calf. Grabbing the scruff of its neck, he raised his fist and began to smash the Golden Eagle King's head with punches!

One punch!
Two punches!

Ten punches!

Twenty punches!
……

Li Yunjing swung his fist in a wide arc, unleashing all his strength, almost without pausing, smashing the Golden Eagle King so hard that he saw stars and nearly collapsed.

"Whoosh whoosh..."

The golden feather suddenly stood up, detached from its body, and shot towards Li Yunjing on its back.

"what……"

Li Yunjing was caught off guard and was pierced by two feathers, causing blood to flow freely.

Almost instantly, Li Yunjing flipped off the Golden Eagle King, his body covered in "Five-Colored Divine Light" to block the attacks from the other feathers.

"Whoosh..."

At the same time, Li Yunjing summoned his "Yin Yang Treasure Mirror". He shone the white side of the mirror on his body, and the white light healed his injuries considerably.

Then the Yin-Yang Mirror flashed again, its black light shining towards the Golden Eagle King's wound.

The black ray shot into the Golden Eagle King's body in an instant.

The Golden Eagle King, already severely injured, was enveloped by the aura of death, and his life force vanished instantly. His enormous corpse floated motionless in the sea.

This demon king was killed in a head-on battle by Li Yunjing!
"Phew...that was close! The Demon King is indeed the Demon King; I almost perished at the hands of this beast!"

Having recovered some of his strength, Li Yunjing began to dissect the demon king's corpse, collecting all its belongings into his "storage ring".

Having slain two demon kings in succession, Li Yunjing was quite satisfied with his gains.

This time, he was severely injured and did not rush to surface to continue the battle. Instead, he took healing medicine in the sea to recover his strength and return to his peak condition.

Meanwhile, on "Hidden Fog Island," the battle was nearing its end.

Under the full-scale attack of the sea creatures, the members of the "Holy Sound Cult" finally began an organized retreat.

On "Holy Sound Island", the fourth-order grand formation has been activated.

The location of the decisive battle was chosen by the "Holy Sound Cult" on their own island, where the most powerful formations and restrictions were located, enough to deplete a large amount of the sea race's manpower.

(End of this chapter)