Rise of the Otherworld.

The sarcophagus vibrated ever more violently, as if a raging beast was imprisoned within, desperate to break free. The dull thuds, like war drums, hammered at everyone's hearts. Their nerves were instantly strained to the breaking point, their hearts in their throats. Everyone's breathing became rapid and heavy, their eyes fixed on the mysterious and terrifying sarcophagus.

"Everyone retreat, be careful!" Lin Yu shouted loudly, and his voice echoed in the empty castle. His eyes were firm and calm. Although he was also full of tension in his heart, as the leader of the sect, he had to remain calm and bring confidence and courage to his disciples.

The disciples retreated one after another, holding their weapons tightly, their eyes fixed on the trembling sarcophagus. Their steps were a little staggering, and their faces were full of fear, but they still obeyed Lin Yu's command, and no one fled.

At that moment, the lid of the sarcophagus flew off with a thud, and a puff of black smoke gushed out. The smoke, thick as ink, quickly spread, shrouding the entire hall in darkness. Within the smoke, a gigantic figure slowly stood up.

As the smoke gradually cleared, everyone finally got a clear look at the figure. It was a massive monster, its body like a small mountain, covered in sharp thorns. Those thorns gleamed coldly in the dim light, as if they could easily pierce through anything. Its blood-red eyes flashed with a ferocious gleam, like a blazing fire, and its mouth emitted a foul, nauseating breath.

"What...what kind of monster is this?" a disciple cried out in horror, his voice trembling and his legs involuntarily weakening.

Lin Yu frowned, secretly assessing the monster's strength. The powerful aura emanating from the monster made him feel unprecedented pressure, but he knew he couldn't retreat at this moment. "No matter what it is, we can't retreat!" He shouted, encouraging himself and his disciples. His voice was firm and powerful, like a beacon in this terrifying atmosphere.

The monster roared, shaking the castle walls slightly. The sound was like a roar from hell, terrifying everyone. It took giant strides and charged towards the group. Each step shook the ground like a small earthquake.

Lin Yu was the first to rush forward, his sword flashing with light as he thrust towards the monster. His figure was like a flash of lightning, instantly passing through the darkness. However, the monster swung its arm, and Lin Yu was repelled by a powerful force, slamming heavily into the wall. He felt his internal organs churning, his throat felt sweet, and a mouthful of blood spurted out.

"Master!" the disciples exclaimed, their voices filled with concern and worry.

Seeing this, Xiaoyaozi unleashed his most powerful spell, sending a beam of light towards the monster. Like a meteor, it streaked across the dark hall. The monster simply dodged the attack by slightly sideways. The beam struck the wall, creating a massive crater.

The other disciples also launched their attacks, the radiance of various spells and weapons intertwining to create a brilliant yet despairing spectacle. But their attacks seemed to have no effect on the monster. It rampaged through the castle, leaving devastation in its wake. Pillars collapsed, walls crumbled, and the entire castle seemed on the verge of destruction.

"This is not a solution. We must find its weakness!" Lin Yu shouted. He endured the pain and stood up again, his eyes sharp as a torch, looking for flaws in the monster's body.

Everyone dodged the monster's attacks while searching for its weaknesses. Every second was filled with danger, and every action was a matter of life and death.

Just as everyone was sinking into despair, a careful disciple spotted a lighter-colored area on the monster's abdomen. "Master, that might be its weak spot!" the disciple shouted, his voice hoarse with excitement.

Hearing this, Lin Yu's eyes flashed with hope, and he rushed towards the monster again. This time, he concentrated all his strength on the sword, and the sword body flashed with dazzling light under the illumination of the light.

Can they successfully defeat the monster and uncover the secrets of the castle? What challenges await them in the future?