The Blood Realm Venerable, Lan Xiao, and Bing Li also burst into a dazzling blood light. The Blood Realm Venerable slammed his cane on the ground, and instantly a blood pond appeared on the earth in front of him. A ferocious Blood Dragon emerged and pounced towards the Undying Tree Avatar with its fangs and claws bared.

Bing Li raised her Wind Snow Sword, slashing out a massive Sword Qi enveloped in harsh winds and snow, causing white icicles to form throughout the hall.

Lan Xiao's fingers writhed, and she shot out five purple rays. Midway, the rays suddenly dispersed, transforming into countless tiny purple spots that turned out to be numerous purple poison bees, darting towards the Black Robed Elder.

"Delusions of grandeur!" the Black Robed Elder sneered coldly, his hands striking out.

Two enormous black palm prints appeared out of thin air, colliding with the Blood Dragon and the massive Sword Qi.

Two massive booms echoed!

The Blood Dragon and the Sword Qi shattered and exploded. The Blood Realm Venerable and Bing Li were blasted away, crashing heavily against the hall's walls.

The wild wind raised by the collision easily blew away Lan Xiao's purple poison bees, preventing them from getting anywhere close to the Black Robed Elder.

At that moment, behind him in the void, a flash of blood light appeared, and two gigantic, blood-colored palms emerged from nowhere, pressing down.

The Black Robed Elder, unflinching, endured the blow of the blood palms. His body merely swayed before he seemed unfazed, spewing out a black, thunder-like beam of light that disappeared into the nearby void.

A tremendous explosion sounded from the void, and a figure was forced out — it was Yuan Wuji, looking somewhat disheveled.

"With just a few pitiful clowns like you coveting my Treasure, you really overestimate yourselves!" the Black Robed Elder scoffed derisively.

However, just then, a gold metallic arm abruptly stretched out from the void behind the Black Robed Elder, piercing through his chest like a giant spear.

Threads of golden light emerged from the golden arm, and the flesh near the Black Robed Elder's chest rapidly turned to gold, transforming into metal.

The Black Robed Elder's expression darkened, and he spat out another black thunderbolt towards the golden arm.

The golden arm quickly retracted, seemingly wary of the black thunder.

The Black Robed Elder grabbed at his chest, tearing off the metallic part. The wound then rapidly healed, significantly reducing his breath.

Behind Ni Mu, a flash of golden light appeared, and a towering golden Puppet emerged.

"It seems you've successfully refined Tongchen into your Lifebound Puppet. Not bad, Tongchen is quite apt for dealing with this Undying Tree Avatar," Yuan Wuji laughed heartily, darting out again as a Blood Shadow.

The Blood Realm Venerable, Lan Xiao, and Bing Li continued their attacks.

The Black Robed Elder's expression grew serious, his long beard stirring and quickly growing longer, transforming into black branches that formed a cage around him, shielding himself within.

This wooden cage was extremely tough. Although it deformed and dented under the fierce attacks from Yuan Wuji and the others, the Elder inside remained unharmed.

Although Tongchen could turn the wooden cage into gold and iron, it hardly affected the Black Robed Elder.

The Black Robed Elder recited incantations, seemingly casting some secret technique.

Seeing this, Ni Mu grew inwardly anxious. He twisted his wrist, revealing a small azure mirror in his palm — the Thousand Illusion Treasure Mirror.

"Go." Ni Mu uttered a light command.

Instantly, spirit light shone from the center of the Thousand Illusion Treasure Mirror, which then suddenly cracked and disintegrated, transforming into a blue mist. It moved with the speed akin to instantaneous movement, shooting towards the Black Robed Elder, penetrating the vine cage, and disappearing into his forehead in a flash.

The Black Robed Elder's face showed a look of horror. His casting was interrupted, his hands flailing as he fell into an illusion.

Ni Mu flipped his hand and raised the Bronze Treasure Mirror, a beam of crystal light enveloping the Black Robed Elder. He uttered a low shout with a trace of force.

The body of the Black Robed Elder rapidly shrank and was pulled by the crystal light, flying towards the outside.

Seeing this, Yuan Wuji and the others were overjoyed. Clenching their Magic Treasures, they readied themselves to unleash a flurry of attacks as soon as the Black Robed Elder's body left the wooden cage.

At that moment, a layer of Black Mist surged around the Black Robed Elder, and his expression quickly cleared.

He let out a roar, and a thick black energy burst out from his orifices.

A blue mist was forced out, reforming into the Thousand Illusion Treasure Mirror.

The Black Robed Elder glanced at Ni Mu, but suddenly virtualized, transforming into a shadow that slipped into the white Array within the hall, appearing beside the silver-white Orb in a flash.

Seeing this, Ni Mu felt a sense of foreboding.

Sure enough, once the Black Robed Elder returned to the Array, he immediately rooted himself to the ground, black roots growing from his feet and connecting with the entire Great Array.

Following that, the twelve giant pillars in the hall lit up with runes, shooting out beams of white Sword Qi-like radiance, which were the same beams that had repelled Ni Mu earlier, striking at the group.

The white radiance was astonishingly powerful and numerous. In the blink of an eye, Ni Mu and the others were injured and had to retreat a great distance to ensure safety.

Yuan Wuji felt aggrieved and led the group to launch several attacks, but not only did they fail to break the Great Array, the increasingly powerful attacks from the Array nearly forced them out of the hall.

"If we delay further, those folks below might also catch up," Yuan Wuji said, looking worried.

"The Undead Demon Tree's Avatar shows no anomalies, which means its main body isn't dead yet. Those people won't be able to reach here anytime soon," Ni Mu remarked.

"What does it matter if those people come or not? Our current trouble is that we can't break this Great Array, and we can't get to the Spiritual Treasure. Ni Mu, you had assured there would be no failings, yet now we face such a significant oversight," the Blood Realm Venerable said somewhat angrily, his words clearly targeting Ni Mu.

"The agreement I awaited was to jointly seize the treasure, not to bear the burden alone. Instead of blaming me, Blood Realm Daoist, you might consider how we should now break the Array!" Ni Mu said, sparing no courtesy as he glanced at the Blood Realm Venerable.

He knew the Blood Realm Venerable well; the latter had once been a member of the Wu Yue Sect, aspiring to ascend to the rank of one of the Six Great Venerables. Unfortunately, the Blood Realm Venerable lacked the strength, and his Cultivation Technique even affected his sanity, leading to a direct rejection from the upper echelons of the sect and a loss of face.

Seeing himself as superior, the Blood Realm Venerable, in a fit of rage, defected from the sect and joined the Tide-rider Scattered Alliance.

Incidentally, Ni Mu had managed to join the Wu Yue Sect by leveraging the Blood Realm Venerable's past connections, hence he had shown much forbearance towards him, but he was not about to let himself be pushed around either.

Blood Realm Venerable burst into fury, his eyes flashing fiercely, about to explode.

"Who is hiding over there!" Yuan Wuji suddenly shouted coldly, his finger like a knife, as a slash of blood-colored Sword Qi cut towards a certain area outside the hall.

A white figure popped out of nowhere, shifting several meters to dodge the slash of the blood-colored Sword Qi. It turned out to be a silver cat, its fur pure white without any trace of other colors.

"Is that the Bai Ze?" Lan Xiao recognized Guoguo at a glance.

The others also looked over, their expressions varying.

However, Guoguo entirely ignored their scrutiny, her gaze fixed on the Array inside the hall.

Ni Mu's gaze fell on the silver cat. After briefly scanning it with his Divine Sense, his expression suddenly changed.

"This aura... you are Xi Ying," he said, his eyes filled with a mix of surprise and confusion.

Xi Ying had used the Golden Sunflower Beast Taming Technique, lodging most of her Divine Soul and Mana into Guoguo. Being identified by Ni Mu didn't surprise her in the slightest.

"Are you that young woman accompanying Yuan Ming? Have you also come here to seize the treasures within Guanghan Palace?" Yuan Wuji asked, his face calm but his eyes flashing with a hint of killing intent.

"Alliance Leader Yuan, do not act rashly; her appearance might not be bad news for us," Ni Mu communicated through a whisper.

Upon hearing this, Yuan Wuji's expression shifted.

"Ni Mu, it seems you've been stopped by this Great Array." Controlled by Xi Ying, Guoguo spoke in a human voice.

"The Undead Tree Demon, being a creature of the Returning Void Stage, set up a very powerful Array. We are not well-versed in formations; naturally, it's difficult to break through. Why are you here, Fellow Daoist Xi? What's the situation below?" Ni Mu asked.

Around the Soluble Cave, the Undead Tree Demon had erected forbidden barriers, preventing people inside from extending their Divine Sense outward and those outside from probing the situation inside.

"Rest assured, those below are entangled by the Undead Tree Demon and won't be able to come up anytime soon," Xi Ying said.

"I see, since Fellow Daoist Xi has come, how about we join forces?" Ni Mu asked, visibly relieved, as he tentatively spoke.

"Oh, what sort of joining forces?" Xi Ying asked in response.

"You help us break this Great Array and kill that avatar. Afterward, that silver Treasure Orb will belong to Alliance Leader Yuan and the others, while you and I divide the Undead Demon Tree and jointly refine the Immortal Elixir. How about that?" Seeing her not refuse, Ni Mu quickly proposed with a hopeful look in his eyes.

Yuan Ming had been using his Divine Sense to monitor the situation here, and upon hearing this, his eyebrows raised.

Xi Ying wanted to use the Undead Tree to refine the Immortal Elixir—could this be her purpose in coming to the Three Immortals Island?

"Joining forces is not out of the question, but as for breaking the Array, you must follow my command; otherwise, all deals are off," Xi Ying said after a moment of thought.

No matter what, if she wanted to break this Great Array of Guanghan Palace right now, relying solely on her power was difficult. Regardless of whether these people would keep their promises later, she needed their help.

"Since Fellow Daoist Xi has a way to break the Array, we will naturally follow your lead," Ni Mu said, joyously, seeing that she hadn't refused.

Yuan Wuji and the others frowned, somewhat dissatisfied with Ni Mu's presumption.

They were unclear about the sudden appearance of Xi Ying, let alone her mastery in Formation techniques, and naturally took her words with a grain of doubt.

However, given the circumstances, breaking the Array and retrieving the treasure was paramount, so Yuan Wuji simply stayed silent, deciding to observe the situation and plan accordingly.

Seeing Yuan Wuji's reaction, the others naturally didn't say more.

"This Array shares about seventy to eighty percent similarity with the Moon Killing Twelve Formation; it isn't easy to break. Therefore, listen carefully to what I'm going to say next," Xi Ying glanced at Yuan Wuji and the others, finally fixing her gaze on Ni Mu as she spoke.

"Good," Ni Mu replied.

Upon hearing this, Yuan Wuji and the others, who had originally shown disdain, now couldn't help but look doubtful.

Xi Ying, indifferent to what they were thinking, immediately recounted the process of breaking the Array.

After listening, the initial doubts of the others had already diminished by half.

"If we do it this way, it just might work," Bing Li said, rubbing her chin thoughtfully.

"There's no time to delay, let's start right away," the Blood Realm Venerable urged impatiently.

"Begin."

At Xi Ying's command, she charged forward first.

Ni Mu and Yuan Wuji quickly followed suit, heading towards different directions in the palace, while the remaining few also set off towards their respective positions immediately.

The Undying Tree Avatar within the Array had already heard their conversation and controlled a white rainbow light, striking at each person individually.

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