In the center of the cave, there was a sword-shaped spirit gem emitting a crystalline glow.

Its material was quite special, and within it, as Chu Feng sensed, was actually Sword Intent!

"A gemstone that can contain Sword Intent!"

"No wonder this Sword Serpent can condense sword light in its eyes!"

Chu Feng exclaimed in surprise.

This gemstone was undoubtedly extraordinary. Although the Beast King couldn't cultivate, just being in contact with the gem's Sword Intent allowed it to hone such sword light.

"Could it be the legacy of an ancient sword cultivator?" he thought, deeply shaken.

The Hundred Thousand Mountains had existed for an incredibly long time.

It was said that in ancient times, countless battles erupted in these mountains, and martial experts were buried here.

If that were true, then the Sword Serpent might have obtained such a gemstone legacy before being domesticated, which wasn't impossible.

"Heavenly Heart Sword Canon!"

Chu Feng approached the gemstone, immersing his senses into it.

A powerful Sword Intent surged towards him.

It felt as if he was in a void world, where a sky-reaching Sword Intent illuminated the sky, ever-changing, showcasing an unparalleled swordsmanship aura.

"My heart is the heart of heaven!"

"My heart is the heart of the sword!"

A majestic divine sound resonated, shaking his spirit, causing that inexplicable force within Chu Feng to tremble.

"This!"

A look of ecstasy appeared on Chu Feng's face. "This is actually a supreme sword technique that only spirit-refining warriors can cultivate!"

He whispered in shock.

Spirit refining could temper to the extreme, creating a supreme spirit soul.

It was said to be able to move out of the body, kill enemies from a thousand miles away, invisibly!

And this was a spirit soul sword technique!

Using the power of the spirit soul to slay formidable foes, silently and unpredictably powerful, and most importantly, it could temper the spirit soul! More direct and forceful than the spirit essence in medicinal baths.

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"My heart is the heart of heaven, my heart is the heart of the sword!"

"Heavenly Heart Sword Canon!"

Chu Feng's senses continuously swept over the gemstone, absorbing ancient and obscure texts into his mind.

"Once I comprehend part of it, my strength will surely increase significantly!"

"And!"

"The spirit soul's attack is extremely mysterious, coming and going without a trace. It's the most swift and sharp sword technique. Once mastered, it will become my killing move!"

Chu Feng whispered excitedly, sitting down cross-legged to begin comprehending the Heavenly Heart Sword Canon.

The battle outside the cave would last a long time.

Though the Sword Serpent was heavily injured, the vitality of fierce beasts was incredibly tenacious.

Facing the siege of several ferocious beasts, it should be able to hold out for several days!

Boom! Boom! Boom!

Outside the cave.

The group of fierce beasts had already fought to a frenzy.

Blood stained the ground red, and the giant lion, engulfed in demonic flames, roared. Its body bore seven or eight bone-deep sword scars, its flesh mangled, yet the ferocity in its eyes remained undiminished.

With each roar, the demonic flames on its body surged a bit more.

Wherever it passed, it seemed capable of melting boulders.

On the other side, the fierce wolf led several fierce beasts, equally irritable, its fur standing like steel needles.

"Awoo!"

The beast roars were continuous.

This directly led to the Beast Tide on Blackcloud Mountain becoming increasingly uncontrollable.

"The great beasts are vying for kingship!"

"We must act, or none of the disciples in the mountain will survive!"

"This mission is primarily to save lives!"

Elder Jian's face was ashen, and before his words finished, he had already transformed into a sword light, disappearing into the forest.

The great beasts vying for kingship, the Beast Tide erupting.

The entire Blackcloud Mountain would turn into a slaughterhouse, and the disciples inside, mostly in the Hundred Refinements realm, would surely die if they couldn't dodge in time!

Caught in the Beast Tide, even experts at the seventh or eighth level of Qi Transformation would be worn down to death by the endless onslaught of fierce beasts!

"Call upon the elders of the Sword Institute to take action!"

Yu Feichen's expression also changed, sending out a sword-shaped signal.

With the Beast Tide erupting, given their realm and strength, it was difficult to save everyone.

Boom! Boom! Boom!

The forest trembled incessantly.

Dust soared to the sky, and from a distance, it looked like several waves of black iron were sweeping through.

Wherever they passed, boulders and ancient trees turned to dust.

"No!"

"Help! I don't want to die!"

Constantly, assessment disciples cried out in despair, fleeing frantically.

"Run!"

"Quickly, run!"

"Return to the foot of the mountain, there's a protective formation there that can shield us!"

Some shouted, transforming into streaks of light.

But similarly, some disciples weren't fast enough and were instantly swept into the Beast Tide, crushed into pulp in an instant.

Without even a chance to struggle, they perished instantly!

This was the terror of the Beast Tide; once caught, death was certain.

And at this time, Chu Feng was still cultivating.

The Heavenly Heart Sword Canon was too profound, with three thousand characters etched into his mind.

Each one was obscure and mysterious.

He continued to comprehend.

"The Heavenly Heart Sword Canon, the remaining part, is divided into two layers!"

"Sword Heart and Heavenly Heart!"

"Sword Heart means the heart is like a sword, thoughts like a sword, actions like a sword, body like a sword!"

"When thoughts move, the sword moves; when the heart moves, the sword moves!"

"To master this layer, one must temper the inexplicable force in the mind into the True Spirit of the first realm of spirit refining!"

Chu Feng's eyes shone brightly, as the inexplicable force in his mind frantically observed the three thousand sword-intent-filled characters.

With each observation, the inexplicable force became a bit more resilient and robust!