After the formidable Martial Cultivator entered the hall, he casually surveyed the structure inside. Not finding any other monsters hiding, he loudly commanded everyone to work together to seal the main gate.

The main gate served as the primary entrance and exit. The sea tribe couldn't tear down the hall walls to open a new passage, so they could only attempt to break through the defensive gate guarded by human Martial Cultivators.

The hall, constructed of diamond-hard rock, couldn't be destroyed even by the Martial Cultivator realm.

After realizing his full power strike left only a shallow knife mark on the wall, the Swordfish Leader abandoned the idea of destroying the wall and led the sea tribe to attack the main gate.

Seeing the razor-sharp blade light coming, the Martial Cultivators guarding the gate fell back one after another. Several higher-level Martial Cultivators could only step forward, jointly creating layers upon layers of defenses to exhaust the blade light's power.

Blocking the Swordfish Leader's attacks alone was difficult, which was why they didn't separate.

Another reason was that their teammates and juniors in the lower realm were still here; they wouldn't abandon their comrades and juniors unless it was the last hopeless moment.

Seeing the sea tribe unable to break into the hall, Lu Yu used the Dragon Binding Rope to capture several high-tier sea tribe members and threw them underground into the hall, creating chaos among the human Martial Cultivators.

The main gate was suddenly lost, breached by the Swordfish Leader, and hundreds of sea tribe members surged into the hall.

Seeing the conquered gate and the sudden appearance of sea tribe among them, the Martial Cultivators were somewhat bewildered, until they heard a voice.

"Go this way."

A bright yellow light mass appeared on the wall deep inside the hall, from which a hand stretched out the other side. It seemed this light mass temporarily constructed a passage through the sturdy wall.

Lu Yu stood inside the hall wall, maintaining the light mass with his right hand, creating an earth-escape passage on the hall wall.

Diamond also fell within the "earth" category, and since there was no sealing Array in the hall, earth-escape could be used on the hall walls.

The human Martial Cultivators were taken by surprise, yet delighted to see the exit inside the hall. Their situation had seemed hopeless, but under the light mass's illumination, hope surged anew.

Weak and injured Martial Cultivators swiftly moved toward the light mass. They had been wary of hidden monsters inside the hall, choosing to stay near the entrance before.

Now, the exit lay at the wall closer to the middle and rear part of the hall. Undeterred by potential hidden dangers, they rushed toward the light mass at full speed.

After blocking the Swordfish Leader's attack, a bald Martial Cultivator in the higher realm retreated to calm his turbulent Qi Blood, turning to see people leaving through the wall's light mass, feeling puzzled.

Then he noticed the color of the light mass, eyes wide. Wasn't this the light that appeared when Lu Yu used earth-escape?

Could Lu Yu be the one helping them?

More sea tribe kept flooding into the hall, while the number of humans inside dwindled, forcing the human Martial Cultivators further into the hall's depths.

As the bald Martial Cultivator retreated to the hall's rear half, he sensed something was off, feeling a growing unease as if something significant was about to happen.

Yet, amid intense battle, he had no time to examine the surroundings or investigate the source of this unease within him.

The light mass hadn't vanished, ruling it out as the cause of his unease, as he wasn't trapped inside the hall overrun by the sea tribe.

"Ah!" Amid fierce combat, a higher-level Martial Cultivator was severely wounded, the Swordfish Leader's blade slicing through most of his neck, nearly severing his head.

The strong vitality of the high-level realm kept him alive, desperately channeling Spiritual Power to stabilize his neck and suppress the blood pouring from it.

Yet his injury was far too severe, with his neck nearly severed in intense battle, leaving no chance to halt and fully suppress the wound, allowing the Swordfish Leader to seize the opportunity to completely sever his head.

His head flew up eyes reflecting the ground, where dark red vines quietly crawled, unknowingly spreading throughout the hall.

His mouth twisted in a crazed smile, realizing everyone was doomed... His expression froze in that smile, his head floating in seawater before an unknown attack crushed it.

Others finally felt something wrong. The bald one keenly noticed the hall's scenery was somehow off.

Those frequently entering underwater ruins knew intact buildings often hid treasures and dangers, the most common being the undying demon flower.

But they hadn't seen any undying demon flower in the hall, making them feel safe to enter.

Originally he thought that perhaps the hall's undying demon flower had been slain, but from the creeping vines around, it seemed the flower might still be alive.

Moreover, the hall's interior walls felt decidedly wrong; unconsciously he believed they shouldn't be like this, even without an undying demon flower.

Swoosh~ Numerous demon flower vines burst from the walls, attacking humans and sea tribes inside the hall.

Now there were few humans left inside, mostly sea tribes.

Strong sea and human cultivators could fend off the demon flower vines' attacks, but weak sea creatures were crushed directly by the vines, leaving only shells with Qi Blood and Spiritual Qi swiftly devoured.

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