Feng Qingyuan seemed to move casually, but in reality, he remained vigilant, his eyes constantly surveying the surroundings, his divine sense already covering the entire hall.

However, compared to his spiritual power, Han Li and Ren Hao's concealment techniques were clearly superior.

After discovering nothing unusual, Feng Qingyuan suddenly quickened his pace, his figure blurring as he arrived in front of the pool deep within the hall. He immediately spotted the blue shield and the blue flute.

His brow furrowed, his eyes revealing undisguised greed, yet he, like Han Li, did not dare to act rashly.

Earlier, he had watched the burly man enter this passage, and upon following him, he saw obvious signs of fighting on the second floor of the hall. The third floor of the hall, however, was empty, which was clearly abnormal.

"Fellow Daoist Ren, I have discovered your hiding place. Why not come out and meet? Let us conspire together for the treasures in this pool?" Feng Qingyuan suddenly focused his gaze and said loudly.

Hearing this, Han Li subconsciously looked towards the northwest corner at the stone pillar. He saw that the burly man was still hiding himself tightly, showing no sign of appearing. He knew that Feng Qingyuan's move was merely a bluff.

The hall was silent, with only Feng Qingyuan's voice echoing faintly, gradually fading away.

Seeing that no one appeared after this probing attempt, his brow furrowed even deeper, and a trace of strangeness flashed in his eyes.

After a long while, he still couldn't suppress the surging greed in his heart. With a wave of his hand, a golden light flashed, summoning a golden-armored puppet with eight arms. With another hand, he activated a spell, ordering the puppet to bend down and retrieve the two immortal artifacts from the pool.

The puppet nimbly leaped, its body skimming across the surface of the pool like a spider. Two of its arms, like dragonflies skimming the water, reached towards the blue flute and the blue shield.

Han Li's brow furrowed, his eyes fixed on the golden-armored puppet, waiting for it to succeed so that he could seize the two immortal artifacts from its hands with lightning speed.

Just as the golden-armored puppet's hands touched the two immortal artifacts, and it seemed about to succeed, the smooth, mirror-like surface of the pool suddenly rippled violently.

A water-blue figure suddenly shot out from beneath the surface, transforming into a streak of light that exploded past, directly carrying the golden-armored puppet out of the pool.

With a loud "clang!"

The golden-armored puppet's body, without any resistance, was heavily thrown to the edge of the pool.

Immediately afterward, a blue foot with webbed toes slammed onto its chest with a "bang," crushing the chest of the golden-armored puppet, which was made of rare refined gold comparable to a True Immortal late-stage cultivator, causing its core to collapse.

This scene happened in a flash of lightning. Feng Qingyuan, sensing the danger, had already retreated over a hundred zhang. In his hand, he held a bright red oiled paper umbrella, spinning rapidly, his face full of vigilance as he looked towards that side.

The owner of the big foot stepping on the puppet's chest turned out to be a blue merman with a fish head and a human body, covered in crystal-like scales. The aura on its body was impossible to detect, but it emitted waves of the law of time, so strong that they made one's heart palpitate.

Feng Qingyuan felt regret as he merely looked at it. He quickly glanced at the stairs behind him, his mind racing, thinking about escape strategies.

As a result, he only made this small movement before the blue merman suddenly opened its mouth, revealing dense and sharp teeth in both rows, and let out a silent, sharp roar.

Immediately afterward, its figure burst apart with a "poof," turning into a blue mist, like morning mist in the mountains, carried by the mountain wind towards Feng Qingyuan.

Seeing the situation was bad, Feng Qingyuan's red oiled paper umbrella suddenly opened, spinning rapidly, emitting strands of scarlet light that enveloped his figure. His whole body transformed into a ball of blood light, and with a flash, he rushed towards the staircase.

However, the blue mist followed like a shadow, instantly arriving at the staircase, catching up with Feng Qingyuan, who was shrouded in the red light transformed by the oiled paper umbrella, and engulfing his entire body.

"Uh..."

A suppressed and hoarse groan, as if squeezed from the depths of his throat, came from within the blue mist.

Immediately afterward, there was the sound of a heavy object falling to the ground, and the entire third floor of the hall returned to silence.

After a moment, all the blue mist swirled back, reforming into the blue merman. With a leap, it splashed a spray of blue water, and fell back into the pool.

Throughout the entire process, it didn't even glance at the blue shield and flute that served as "bait."

On the ground at the staircase, there remained only a completely withered and shrunken dark brown corpse, and a dilapidated oiled paper umbrella that was already mottled and devoid of spiritual energy.

Han Li, lying on the crossbeam at the top of the hall, saw all this clearly, his heart filled with even greater surprise.

What exactly was this suddenly emerging thing, that it could kill a Golden Immortal in an instant?

At this moment, a purple figure appeared silently at the entrance of the third floor. It was none other than Feng Lin.

Han Li's pupils constricted slightly. He silently chanted a mantra, and his concealed figure shrank again.

Feng Lin walked over slowly, looked at Feng Qingyuan's corpse, and then glanced at the blue pool. Her expression was calm, seemingly not surprised at all.

"Do you two want me to test the merman's supernatural powers again? Unfortunately, I am not Yuan Feng. You don't need to hide anymore, come out." The woman glanced in one direction, then looked at Han Li's hiding place, and said lightly.

Especially now, a layer of purple light appeared in Feng Lin's eyes, with countless purple light spots constantly flickering, like the birth and death of a brilliant galaxy in the night sky.

Han Li was startled. This woman had also cultivated the Nine Nether Demonic Eyes, and it seemed that her supernatural powers were even above his.

Moreover, Feng Lin's temperament had changed greatly at this moment. The gentleness and charm she had before were gone, and her eyebrows were as cold as ice, as if she were a supreme empress.

His mind raced, and he did not hide any longer. He slowly walked out from his hiding place.

Almost at the same time, Ren Hao's figure appeared in another place.

"Hehe, Fellow Daoist Feng, you are too serious. How dare I? That Yuan Feng seems clever, but in reality, he is incredibly stupid. He can't even see the dangers here, and he is not worthy to join forces with us three. It is natural that he died. Fellow Daoist Li and Fellow Daoist Feng have profound cultivation, and I admire them very much." Ren Hao laughed and said.

Han Li glanced at Ren Hao without expression and said nothing.

"Humph! Don't try to be polite. Let's not beat around the bush. Now the treasure is right in front of us. Let's join forces to kill that blue merman. As for the treasures here, let's each grab them based on our own abilities, how about that?" Feng Lin snorted, ignoring Ren Hao's flattery, and said directly.

"No problem, that monster has some skills, but how can it be a match for our combined forces?" Ren Hao immediately nodded and agreed loudly.

Han Li stood there, still saying nothing.

"What, Fellow Daoist Li, do you disagree with this idea? Or do you have a better plan?" Feng Lin looked at Han Li and said slowly.

"Joining forces is not a problem, but I have limited knowledge and cannot compare with the vast knowledge of the two fellow Daoists. Regarding the origin of that blue merman, I hope the two fellow Daoists can enlighten me." Han Li stroked his chin and said calmly.

The blue merman's aura was strange, and it was completely different from them cultivators. It seemed to be some kind of existence condensed from spiritual power.

"Fellow Daoist Li is too modest, but regarding that blue merman, I am not very clear either," Feng Lin shook her head and said.

Ren Hao glanced at Feng Lin, also shook his head, and said that he did not know either.

Seeing this, Han Li was a little disappointed.

Since the three of them had agreed to join forces, they did not delay any longer. After discussing the tactics through voice transmission, they pounced towards the blue pool from three directions.

Ren Hao flew the fastest, and in a flash, he arrived near the pool. A palm flew out of his sleeve, and with a lightning-like flip and grab.

With a "chila" sound!

A blue light flashed in the sky above the pool, and a blue beast claw the size of a house appeared, covered with scales, and exuded ten thousand rays of blue light, looking terrifying, grabbing towards the blue shield in the pool.

The water in the blue pool swirled, and the blue merman reappeared, waving her slender hand, and a blue staff shadow emerged.

This staff shadow looked ancient and profound, carrying an ancient desolate aura, like the scepter of an ancient water god, hitting the blue beast claw.

With a huge "bang!"

The blue beast claw, which looked extremely powerful, was shattered by the staff in an instant, turning into a large patch of water light that dissipated.

Ren Hao's eyes flashed, but he did not show any surprise. He pinched a magic seal with his hand.

The blue giant sword behind him immediately turned into a blue rainbow and soared into the sky. After spinning around in mid-air, it swelled wildly as blue light burst forth.

In an instant, a blue giant sword the size of a hundred zhang appeared above Ren Hao's head, and then slashed heavily towards the blue merman.

Hua la la!

The sound of roaring sea waves resounded in the nearby void, the water vapor in the void increased greatly, and the air suddenly became extremely heavy.

On the other side, Feng Lin also launched an attack.

She raised her hand, and a black light shot out, and transformed into a black giant gate against the wind.

This giant gate was more than ten zhang high and two or three zhang wide. There were patches of reddish-brown on it, which seemed to be bloodstains. Two dark purple door rings hung on the giant gate, jingling.

On each side of the giant gate, there was also an inscription of a blue-faced fanged demon god with blood-red eyes.

Boundless devilish energy radiated from the black giant gate, making people shudder at the sight of it.

Feng Lin chanted incantations, and spit out a ball of essence blood, which turned into a blood mist and merged into the black giant gate.

The two ghost-faced reliefs on the black giant gate shone brightly in their eyes, and their mouths opened at the same time, spitting out two blood lights, which turned into two blood-colored hands in a flash, grabbing the two dark purple door rings and pulling them hard.

The black giant gate trembled with a "buzz" and slowly opened.

The sound of wailing ghosts resounded from the gate, and then a thick black light pillar gushed out from it, hitting the blue merman.

The black light surged, condensing into ferocious faces, some human faces, and some various beast faces, making shrill screams.

Boundless pain radiated from the black light pillar, no one knew what supernatural power it was.

At this time, Han Li also came to the front of the pool. Feeling the aura of the black light pillar, his mind felt uncomfortable for a while, and he quickly activated the Refining God Technique, and then recovered.

He took a deep look at Feng Lin, and at the same time, he pinched a sword tactic with one hand.

Three green small swords flew out of his sleeves, and with a flash of sword light, they turned into three green giant swords, with thick golden electric arcs appearing on the surface, making a rumbling thunder.