Jie Cha witnessed this scene, his expression changed drastically, and his figure vanished like the wind, concealing himself in invisibility.

Beneath the sacrificial altar lay a vast, boundless soluble cave, its depths seemingly endless, as if leading to another unknown world.

In the middle of the cave stood a towering green-gray giant tree, like an ancient guardian deity, which was, astonishingly, the legendary World Tree.

Its trunk soared into the clouds, towering over a hundred feet, as thick as a city wall, dozens of feet wide, with branches intertwining and diverging into hundreds of branches, lush with greenery and teeming with life.

Even more astonishing was that this World Tree's height was not its ultimate limit. Its crown seemed to pierce through the void, with all its branches and leaves concealed in the endless void, their entirety unseen.

Even so, the scale of this World Tree was already breathtaking, as if it were a masterpiece of nature, filled with endless mystery and majesty.

Beneath the World Tree lay rows upon rows of formations that extended endlessly.

These formations varied in color, numbering as many as thirty-six.

Each grand array was composed of tens of thousands of array patterns, intricate and complex, each was a seventh-level array, arranged according to the circulation of the heavens, resembling a cosmic chessboard, seemingly containing infinite profound mysteries and wisdom.

At this moment, a fluctuation abruptly arose in the void below the World Tree, and a silver token appeared.

With the token's appearance, thick black aura surged forth, quickly coalescing into the figure of Su Wu.

Su Wu swiftly scanned the surroundings and, upon seeing the towering World Tree and the thirty-six seventh-level arrays below it, couldn't help but feel a bit of awe in his heart.

Though he wasn't an array master, he was well-versed and quickly discerned the mysteries of these formations.

Among these arrays were attack formations, defense formations, and gathering spirit formations, all emanating a faint glow and independently operating, guarding this mysterious space.

What surprised Su Wu most was that there seemed to be some mysterious connection among these thirty-six seventh-level arrays, as if they were interlinked, subtly forming a grander hexagonal formation.

This hexagonal formation seemed to encompass all the changes of formations in the universe, appearing profound and deep.

"This feeling... could this hexagonal giant formation be the legendary Eight Extremes Array?" Su Wu marveled silently to himself.

He couldn't imagine what kind of extraordinary talent it would take to perfectly integrate so many formations, combining them into such an unparalleled, grand formation.

Su Wu did not linger and immediately flew towards the center of the grand array.

During his flight, black aura continuously emanated from his body, swiftly landing on the formations below. However, instead of refining the formations, it began to quickly corrode and destroy these seventh-level arrays.

Although the seventh-level arrays were powerful, at this moment, without anyone to activate them, numerous array patterns were severed by the black aura, and the formations began to be destroyed.

One by one, the arrays extinguished their light, and the entire underground formation started to tremble violently, as if on the brink of collapse.

Meanwhile, Jie Cha had already pursued into the underground space.

He saw Su Wu crazily destroying the arrays and immediately became furious, shouting, "Stop! This place is the core of the Three Realms Immortal Boat. If it's destroyed, the Three Realms Immortal Boat will collapse with it!"

Su Wu seemed not to hear, letting out a chilling laugh, releasing more black aura from his body, continuing to destroy the other arrays.

His laughter echoed in the cave, filled with madness and determination.

"How dare you!"

Jie Cha's face turned ashen, his eyes blazing with anger.

He suddenly pressed his palms into the void, and brilliant blue light burst from his palms, swiftly connecting with the formations on the ground, weaving into a complex network.

Jie Cha's fingers moved swiftly, the blue light flickering with them, as if the formations on the ground were infused with new life, causing each to erupt with dazzling radiance.

These lights were brilliant, like falling stars, illuminating the entire cave as if it were daylight.

The defense arrays lit up first, emitting blue and gold lights, surging forth like ocean waves, roaring mightily.

These lights met with the Heavenly Cicada black aura released by Su Wu. Although they couldn't completely block it, they significantly slowed the aura's corrosive devouring speed, buying precious time for a counterattack.

Immediately following, Jie Cha activated each of the attack formations.

Fiery clouds gathered atop the formations, as if fire phoenixes were soaring among them, exuding a blazing aura. Beams of lightning intertwined into a net, sparking bright lightning, releasing powerful electrical energy, layers of ice fog permeated around the formations, so cold it seemed to freeze everything.

All these attack methods exploded with powerful might, crashing towards the black aura and directly at Su Wu like a storm.

Although the black aura was fierce, it could not withstand such a dense barrage of attacks, and it retreated step by step, being gradually consumed, and eventually dissipating into the air.

Seeing this, Jie Cha felt slightly relieved.

He knew this was far from enough, as Su Wu's strength was unfathomable, and he must go all out to truly stop him.

…

On the ground, after Su Wu and Jie Cha's figures disappeared one after the other, Yuan Ming did not leave immediately.

At this moment, he was still single-mindedly imparting mana into the towering tree trunk, carefully transmitting every strand of mana, fearing that he might disturb something.

Finally, after his relentless efforts, the refining process was complete.

On the forbidden wood pillar, azure light flickered ceaselessly, and each rune seemed to be endowed with life, shimmering with brilliant hues, as if declaring they had a new master.

The apprehension in Yuan Ming's heart finally settled at this moment, and he felt a sense of solidity he'd never experienced before.

"It's done."

Xi Hezi's voice echoed in Yuan Ming's sea of consciousness, carrying a hint of fatigue.

Then, the towering World Tree seemed summoned, slowly floating out from the azure light, gently detaching from the wood pillar, and returning to Yuan Ming's dantian.

"Thank you, Fellow Daoist Xi Hezi." Yuan Ming sincerely expressed his gratitude.

He knew that without Xi Hezi's help, this forbidden wood pillar would have long been subdued by Su Wu, and all his efforts would have come to naught.

Once the World Tree departed, the forbidden wood pillar also returned to its original state, with the array patterns on it still shimmering brilliantly, undiminished in glory.

Yuan Ming's palm gently brushed the wood pillar, and suddenly, a warm current surged from the pillar, flooding into his sea of consciousness.

It was a torrent of forbidden information, uncontrollably surging into his divine soul, deeply imprinting itself like a brand.

The forbidden information was so extensive that Yuan Ming, with his current cultivation, could hardly bear it for a moment, his pupils briefly losing focus.

After a while, he recovered, his face revealing an irrepressible look of delight.

The information that surged into his mind was the forbidden knowledge of the interior of the Three Realms Immortal Boat.

Inside the Three Realms Immortal Boat, thirty-six seventh-level magic arrays were deployed, known as the heavenly gang number, hidden deep beneath the altar.

Besides these seventh-level magic arrays, there were seventy-two sixth-level magic arrays and three hundred sixty-five fifth-level magic arrays, distributed further away, collectively shielding this Immortal Boat.

These arrays were arranged according to the circulation orientation, linked by the spirit veins, and under synergy, their power was exceedingly formidable.

Just the simultaneous operation of the thirty-six seventh-level magic arrays could achieve the power of the legendary eighth-level array.

However, Yuan Ming's cultivation was shallow, and even after refining the forbidden wood pillar, he couldn't activate so many great arrays.

Despite this, Yuan Ming was not disappointed but rather showed a look of joy.

During the process of communicating with the forbidden, he memorized the array maps of two seventh-level magic arrays, which was an extremely precious treasure for him.

Yuan Ming is now a sixth-level array master; comprehending several seventh-level magic arrays could significantly enhance his array formation cultivation.

Unfortunately, due to tight time constraints, he couldn't thoroughly investigate other seventh-level magic arrays.

In the Silver Tower Space, there was a spatial teleportation forbidden. Yuan Ming activated the wood pillar, his form flickered, and he vanished from his original spot.

The next instant, he appeared in the underground space.

Upon emergence, Yuan Ming immediately saw Su Wu, who was continuously releasing black qi to damage the great array, and Jie Cha, who was in hot pursuit.

His eyes briefly flickered, deciding not to join in or take any other action.

He understood there was still a significant gap between his strength and Su Wu's, and rashly stepping forward would only increase the danger.

Thus, Yuan Ming once again activated the forbidden wood pillar, and with a flicker, he appeared beside the towering World Tree, under the watchful eyes of Su Wu and Jie Cha.

In the former's eyes was a mix of jealousy and anger as he accelerated the release of the black qi, while the latter showed no particular change in expression upon seeing Yuan Ming.

Yuan Ming gently placed his palm on the tree trunk, and from his palm emerged roots of the World Tree, attempting to root themselves into the giant tree.

This giant tree contained an immense amount of World Tree wood energy, far beyond what his World Tree could compare to. If he could refine it all, his World Tree could ascend to the heavens in one step.

A few breaths later, Yuan Ming showed a look of helplessness and withdrew his palm.

This giant tree also contained similar sealing forbiddances, preventing him from absorbing its wood energy.

Although a bit regretful, this attempt was not in vain. Just now, he immediately discovered something: the huge tree shadow his World Tree previously communicated with was indeed this World Tree before his eyes.

Inside this tree was a vast space, storing an immense amount of heaven and earth spiritual power, forming a colossal sea of spiritual power, surpassing any spirit vein Yuan Ming had seen.

The World Tree is known as the Ancestor of Ten Thousand Trees, surpassing the Undying Tree by far, with its roots able to directly take root in the void turbulence, drawing spiritual power.

The Three Realms Immortal Boat has been stationed here for unknown ages, during which the giant tree has amassed tremendous heaven and earth spiritual power, and all the arrays within the Immortal Boat are operated with the spiritual power provided by the World Tree.

Yuan Ming's World Tree had just formed and had yet to display a similar function.