The "Survival on the Train" game has bugs, it's really laggy!

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The surrounding rainwater was stained green, but it was quickly washed away.

[Congratulations! You have successfully defeated the 1.5-star elite merman "Siren"!]

【您获得了：鲛人肉x80单位、鲛人骨x5单位、鲛珠x1、留声海螺x1对、列车币x6。】

A series of system notifications rang in Su Yuan's mind.

He bent down and pulled a wet cloth bag from the smashed corpse.

Upon opening the bag, a smooth, warm-looking bead, about the size of a pigeon egg, lay quietly inside, radiating a soft glow.

There was also a pair of oddly shaped conch shells and six cold coins next to it.

【Name: Mermaid Pearl】

[Type: Dropped Item]

[Quality: Rare]

[Effect: When placed in water, it can slowly gather moisture from the air and has a slight water-purifying effect.]

"Good stuff!" Su Yuan's eyes lit up.

If this thing were listed on the trading channel, it would definitely cause a sensation.

In this survival world, a treasure that can continuously produce water and purify it is of immeasurable value.

Unfortunately, the drop rate is too low.

He killed so many male merfolk, and none of them dropped, except for this elite female merfolk who dropped one.

If it doesn't continue to produce, Su Yuan plans to keep this one for himself, or extract the relevant entries.

Su Yuan then picked up the pair of conch shells and examined them.

【Name: Phonograph Conch】

[Type: Special Item]

[Quality: Rare]

[Effect: A product of an unknown maritime civilization, a pair of special conch shells. If you speak to one, the other can hear the sound within a certain range. The sound travels even further in rainy weather.]

"It's similar to a walkie-talkie, not bad." Su Yuan casually put the conch and the shark pearl into his storage bag.

As for the six train coins, they were exactly the right number, bringing his total back to ninety-nine.

Su Yuan looked up and found that most of the merfolk had run away, but a few remained on the beach.

After the mermaid died, they seemed to have lost their backbone, standing there making "gurgling" noises, at a loss.

Clearly, these guys aren't very clever.

Su Yuan, carrying the warhammer, strode over.

Instead of killing them all, he deliberately chose the merman closest to him who looked the strongest, swung his warhammer, and with a "crack," decisively broke its leg.

The merman let out a painful hiss. Driven by its survival instinct, it dragged its injured leg, abandoned its attack, and limped away towards its lair without looking back.

The remaining few, as if terrified, dared not linger any longer and turned to rush into the depths of the turbulent sea, disappearing in the blink of an eye.

Su Yuan watched the fleeing merman and followed behind at a leisurely pace, taking the opportunity to tally up his spoils.

Including the female mermaid, a total of nine mermaids were killed, and nearly 300 catties of mermaid flesh and 12 units of mermaid bones were harvested.

The rain was getting heavier and heavier, and the sky was getting darker and darker.

The wounded merman dragged a broken leg, leaving a clear trail of blood and drag marks on the muddy beach.

Su Yuan hung there, a few dozen meters behind it, neither too close nor too far, like a patient hunter.

Soon, he followed the merman to the foot of a steep, black cliff.

This place is less a bay and more a long, narrow mountain range half-eroded by the sea, with long coastlines on both sides, full of jagged reefs and steep cliffs.

The nest's location was indeed well-hidden.

If it weren't for the guide leading the way, even with intelligence information, it would have been quite a struggle for Su Yuan to find this cave entrance in this heavy rain.

That's why he used one of the merfolk to find their lair.

In retrospect, the plan did indeed work.

Below the cliff, a dark cave entrance appeared before us. The entrance was covered with slippery moss and some unidentified shellfish. A strong, fishy smell mixed with the salty, damp smell of the sea wafted out of the cave.

The injured merman saw the cave entrance as if it were his savior, let out a hiss, and scrambled inside.

"Is this another classic 'block the enemy's lair' scenario?" Su Yuan muttered, looking at the dark entrance.

He didn't know if there were other exits in the cave, but he was fine as long as he had collected enough materials. The key was still that mutated merman.

Without further hesitation, he hoisted the Demon-Slaying War Hammer onto his shoulder and charged straight in.

The cave was a maze of interconnected passages, damp and dark, with sticky moss and puddles underfoot, and the stench in the air was so strong it was nauseating.

Just as he had thought, this place was like a maze.

Finding and killing all these merfolk would probably be very difficult.

Su Yuan decided to walk along the main road first, heading straight for the mutated merman leader mentioned in the intelligence.

He hadn't gone far when two male merfolk wielding bone spears suddenly leaped out from the side paths, roaring as they charged at him.

"Bang! Bang!"

Su Yuan didn't even stop walking. He swung his warhammer left and right, and the two ugly fish heads exploded.

With Su Yuan's current strength, these low-level male merfolk are no different from paper in front of him.

After walking a little further in, Su Yuan pursed his lips and realized that he actually felt a little lost. There were too many forks in the cave, and it was really hard to find his way around in a short time.

So he simply stopped, closed his eyes, and decided to try to actively activate his senses.

The "evolution" talent is mostly triggered passively; only when in danger can certain abilities be actively activated under the guidance of the subconscious.

But this time, Su Yuan wanted to see if he could actively control this power.

"The intelligence said there were three players here, two besides me, but I haven't sensed any living beings since I arrived... If I'm not mistaken, they've most likely been captured." Su Yuan quickly calculated in his mind.

"Given this tribal structure, food should be prioritized for the chief and the young. I wonder if the online count will still be displayed after a player dies... Perhaps, if I can identify the 'human scent,' I can find the place."

Su Yuan began to concentrate, focusing all his attention on his sense of smell.

The world around seemed to quiet down at that moment, with only the "drip-drip" sound of raindrops falling on the rocks.

As his mind gradually calmed down, the strong, fishy smell in the cave seemed to be peeled away by his brain, and other subtler and more complex smells in the air began to slowly enter his mind.

The salty, fishy taste of seaweed, the sweetness of shellfish, the coldness of rocks... and more...

A faint, almost imperceptible odor, mixed with the stench, was the putrid smell unique to mammals.

The smell of rotting human flesh is fundamentally different from the stench of these fish monsters.

Although he did not successfully trigger the "evolution" talent, Su Yuan did indeed detect a different kind of scent.

Soon, this olfactory sensation transformed into a more vague yet direct intuition, guiding him toward one of the secluded side paths.

"That's most likely the smell of human corpses. Or maybe those two players were just captured but not killed, and the smell of corpses I'm detecting is someone else's..."

The further you go in, the clearer the smell becomes.

The tunnel narrowed and then widened again, winding and turning until Su Yuan finally arrived at a relatively spacious cave hall, where the view suddenly opened up before him.

"Found it!"

The light here is brighter than outside. On the rock walls of the cave ceiling, there are mosses that emit a faint blue light, making the entire hall look like a dreamlike underwater palace.

In the center of the hall, dozens of merfolk were gathered around a huge pool of water, making low gurgling sounds from their throats, as if they were performing some kind of ritual.

In the center of the pool, on a huge rock, lay an exceptionally large monster.

At the same time, detailed information about the monster appeared before Su Yuan's eyes.

Name: Six-Legged Mermaid

[Type: Special Monster]

[Background: This generation of merfolk has a mission passed down through generations: to guard the mysterious ruins in the deep sea. But this mission has also become a curse etched into their blood.]

[Synopsis: Too much time has passed, and the merfolk have long forgotten their mission. They left the ruins and came to the coast, but due to a curse, they cannot leave. Until a wise female merfolk tried to help her people escape their predicament, she ventured into the ruins to explore. However, after emerging from the ruins, she was severely cursed and died after giving birth to this monster.]

[Danger Level: Three Stars]

This six-legged merman is five meters long. Its upper body still retains some characteristics of a female merman, but its skin is a sickly pale color, covered with strange bluish-black patterns.

Its lower body was no longer a fish tail, but six thick, segmented, spider-like giant claws, firmly gripping the reef.

At this moment, it was lying on the reef, tightly embracing a huge skeleton that had long since turned into white bones, which should be the remains of the previous female mermaid chieftain.

Its empty eyes were fixed on the skeleton in its arms, and it occasionally let out a low growl that was hard to understand, as if it was telling a story.

The six-legged merfolk have no reason and act entirely on instinct.

The other merfolk in the tribe seemed to regard it as a new hope, expecting it to grow into a new guardian deity, leading the tribe to break free from the curse and leave this bound bay.

They kept feeding it the prey they caught, hoping it would grow up quickly.

However, things gradually took an unexpected turn for the better than any of the merfolk had anticipated.

Su Yuan understood that the danger level of many dungeons is only superficial. This dungeon's danger level is 1.5 stars, and the most dangerous monster on the surface is the merman outside.

But this instance may actually be even more terrifying than the previous farm, because this monster alone has a danger level of three stars, and it is connected to a mysterious ruin!