Rise of the Otherworld.

Lin Yu led everyone to continue moving forward in the ruins. At this time, the sky gradually darkened, and a thin layer of mist filled the surroundings, making the already mysterious ruins even more eerie and terrifying. The mist seemed to have life, flowing slowly, sometimes gathering into strange shapes, and sometimes dissipating without a trace.

"Everyone, be careful. The atmosphere here is not right." Lin Yu reminded everyone in a low voice. His voice was particularly clear in this silent environment. He gripped the sword in his hand tighter, and his knuckles turned slightly white due to the force.

The disciples followed him cautiously, vigilantly observing the surroundings. Their footsteps echoed in the empty ruins, sounding particularly heavy. Everyone's heartbeat quickened, and their breathing became rapid.

Suddenly, a chilling wind blew, bringing with it a chill so biting it seemed to penetrate one's soul.

"What is that?" a disciple exclaimed, his voice shrill with fear.

Everyone looked in the direction of the sound and saw a vague figure looming in the mist. The figure was erratic, sometimes clear, sometimes blurry, making it difficult to grasp.

Lin Yu's heart tightened, "Stay alert!" His eyes became sharper and stared at the figure intently.

The figure gradually approached, revealing itself to be a distorted monster. Its skin was a strange, dark blue, its eyes gleaming blood-red, and green saliva dripped from its mouth. It lunged at the group, claws and fangs bared, stirring up a gust of bloody wind.

Lin Yu did not flinch and stepped forward. He dodged the monster's attack and swung the sword in his hand, slashing at the monster's arm.

The monster roared, turned around and pounced on Lin Yu again. Lin Yu started a fierce fight with the monster. His sword streaked across the air, colliding with the monster's claws, making a harsh sound.

The disciples unleashed their own spells. Some summoned fireballs and hurled them at the monster; others cast ice arrows, attempting to slow it; still others used talismans, unleashing powerful forces. For a moment, light flashed, and various spells intertwined in a desperate struggle with the monster.

After a hard fight, the monster was finally defeated. It fell to the ground, roared unwillingly, and then turned into a puff of smoke and disappeared.

"What the hell is this place?" a disciple said, panting, his face covered in sweat and his clothes soaked with sweat.

Lin Yu looked at the deep road ahead and said, "No matter what it is, we can't retreat. Now that we have come here, we must find what we want." His voice was firm and powerful, bringing a glimmer of courage and hope to everyone.

Just then, they heard a melodious flute sound. The sound seemed eerie in the silence of the ruins, as if it came from another world. The sound was gentle and melodious, yet tinged with a hint of sadness and desolation.

Everyone looked at each other, not knowing what the flute sound meant.

"This flute sound...is it some kind of trap?" a disciple whispered.

Lin Yu frowned and said, "Don't act rashly, observe for a while."

They stood there quietly, listening to the flute sound. As time went by, the flute sound became clearer and clearer, as if guiding them in a certain direction.

"Master, what should we do?" asked a disciple.

Lin Yu pondered for a moment, "Follow the sound of the flute and see what's going on. But everyone must be careful."

Everyone walked cautiously in the direction of the flute sound. The fog on both sides of the road became thicker and thicker, as if it was about to swallow them up.

Suddenly, a huge stone door appeared in front of them. The door was tightly closed, with some strange patterns and symbols engraved on it.

And the sound of the flute seemed to come from behind this stone gate.

Can they open this mysterious stone door? What secrets are hidden behind the flute sound?