Sect: Starting with Comprehending Thunder Skill-Chapter 820 - 400: Slaying the Demon King

As the battle continued, both sides suffered heavy losses.

The surface of the sea was littered with the corpses of countless Sea Race demon beasts, and the blood had dyed the seawater red.

The cultivator side also had many casualties, but under the leadership of the "Holy Sound Sect," they still held onto "Mist Concealment Island," with no intention of retreating.

At this moment, a commotion suddenly arose at the back of the Sea Race.

Li Yunjing looked into the distance and saw a giant sea beast slowly emerging from the water.

This sea beast’s size was larger than any demon beast that had appeared before, and it emitted a powerful aura.

The appearance of the Tier Three Demon King made the atmosphere of the entire battlefield tense.

It opened its bloody maw and spewed out black columns of water, ripping many cultivators into pieces wherever the water columns went.

"Not good, the power of this sea beast is too strong, we must find a way to stop it!"

A cultivator from the "Holy Sound Sect" shouted loudly.

Just as everyone felt despair, the Golden Core Realm Elder of the "Holy Sound Sect" finally made his move.

He wore a golden robe and flew out from the "Holy Sound Sect’s" formation.

This person emitted a powerful aura that shook the surrounding air.

"Hmph, Profound Turtle Demon King, you dare to cause trouble on my Holy Sound Sect’s territory!"

The elder snorted coldly and swiftly performed seal techniques.

A golden flute appeared in his hands.

The flute was immediately played.

"Rumble!"

Amidst loud explosions, a sound wave spread from the flute.

Even the air trembled, splitting the waves in two!

Many demon beasts couldn’t dodge in time and were hit by the invisible sound waves, turning into blood mist.

These demon beasts were directly sliced into pieces by the sound waves!

Even on the body of the Profound Turtle Demon King, explosions erupted continuously.

The powerful impact force flung the Profound Turtle Demon King dozens of yards away; however, the demon king, with its thick skin and shell armor, showed no signs of injury.

"Amazing sound wave skill!"

Seeing the elder’s sound wave skill being so formidable, Li Yunjing couldn’t help but get a little excited.

Regarding sound wave skill, he hadn’t learned any powerful techniques in the "Shenxiao Dao Sect."

The Profound Sect’s Nine-character True Words and other sound wave techniques were treasures of the "Shenxiao Dao Sect."

Li Yunjing couldn’t afford to exchange for them!

Many heritages come from celestial gods above!

If he wants to learn them, Li Yunjing needs to contribute massively to the "Shenxiao Dao Sect"!

With the elder of the "Holy Sound Sect" taking action, the situation balanced again, and Li Yunjing continued charging at the front, targeting powerful Tier Two demon beasts.

"Roar..."

Soon, the Profound Turtle Demon King let out a painful roar, evidently not expecting the sound wave skill to break through its defenses.

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

Sound wave skill was originally an unconventional divine technique.

The "Holy Sound Sect" specializes in sound wave skills, fearlessly defending against ultra-powerful demon beasts, making it a perfect counter for such creatures!

"Everyone, attack with all your might now!"

The elder of the "Holy Sound Sect" shouted loudly during a brief respite.

Clearly, constantly relying on sound wave skills was taking a toll on him.

"Kill!"

The crowd responded vigorously, unleashing their strongest magic and techniques, attacking the Profound Turtle Demon King.

For a moment, various lights intertwined, illuminating the entire battlefield as if it were daylight.

Though the Profound Turtle Demon King was strong, it gradually struggled to withstand the barrage of attacks.

Its body was covered in wounds, continuously bleeding, staining the surrounding seawater red.

Its eyes revealed a hint of fear, as it started sinking into the sea.

As long as it entered the deep sea, safe from sound wave skill attacks, the demon king could recover again!

"Splash" sounded as Li Yunjing leapt into the sea!

Taking advantage of the wounded Profound Turtle Demon King, Li Yunjing intended to claim its life!

In the Immortal Cultivation Realm, turtle-type demon beasts are known for their long lives.

Especially this Tier Three Demon King, which is simply a treasure trove.

In any case, Li Yunjing couldn’t let this demon king escape!

Li Yunjing plunged into the sea, moving swiftly like a swimming fish, heading straight for the injured Profound Turtle Demon King.

"Boy, you dare pursue this king?"

Though deeply wounded, the Profound Turtle Demon King remained formidable as a Tier Three demon beast.

It sensed Li Yunjing’s pursuit and violently swayed its tail, stirring up a massive undercurrent, aiming to shred Li Yunjing into pieces.

"Even in perfect health, you might not be my match, let alone bearing severe injuries!"

Li Yunjing snorted coldly, his true essence circulated within, and the undercurrent couldn’t shake him in the slightest, rapidly closing in on the Profound Turtle Demon King.

Li Yunjing twisted seal techniques, his whole body surged with thunder power, channeling into the "Yin Yang Five Elements Celestial Derivation Sword," launching a fierce "Sunflower Divine Thunder" at the Profound Turtle Demon King.

"Boom!"

At this moment, Li Yunjing’s "Sunflower Divine Thunder," empowered by his own thunder power and the "Yin Yang Five Elements Celestial Derivation Sword," had its potency increased tenfold!

This strike of "Sunflower Divine Thunder" was enough to kill a Golden Core Realm cultivator!

The massive explosion in the ocean was even more powerful, directly tearing off two pieces of turtle shell!

"Ah..."

The intense pain caused the Profound Turtle Demon King to let out a low growl.

The Profound Turtle Demon King abruptly turned around, ceasing its escape downward, instead opening its bloody maw, lunging at Li Yunjing.