Rise of the Otherworld.

After a short rest, everyone continued to explore the castle under Lin Yu's leadership. Although the mysterious power had temporarily subsided, there was still an uneasy atmosphere in the air. With every step, they seemed to feel an invisible hand pulling them in the dark.

They walked along the dim corridor, their footsteps echoing in the silence. The torches on the walls flickered, as if ready to go out at any moment. The weak flames flickered in the darkness, illuminating only a small area in front of them, while behind them was endless darkness.

"Master, I feel like there's a pair of eyes watching us," a disciple whispered, his voice filled with fear. His body trembled unconsciously, and his eyes kept darting around, as if he was afraid that some unknown being would suddenly pounce out of the darkness.

Lin Yu frowned and looked ahead firmly, "Don't scare yourself, be careful around you." His voice was steady and powerful, trying to give the disciples a sense of security.

At this moment, a huge stone door appeared in front of them, engraved with complex patterns and runes. Those patterns and runes flickered with a faint light, as if telling ancient secrets.

Xiaoyaozi walked forward and observed carefully, "Master, this seems to be some kind of seal." His fingers gently touched the runes, his brows furrowed, and he fell into deep thought.

Lin Yu pondered for a moment, "Let's try together to see if we can open it." His voice was decisive and resolute. Although his heart was filled with unknown fear, he knew that retreating was not a solution.

Everyone cast spells, and the various lights converged into a powerful force that pushed the stone door open. With a low roar, the stone door slowly opened, and a powerful force rushed towards them. The force was like a howling gale, and everyone almost lost their balance.

They entered the room and saw a huge crystal ball in the center. A strange light shimmered within it. The light was multicolored, sometimes bright, sometimes dim, as if pulsing with life. A thin mist surrounded the crystal ball, making it even more mysterious.

"What on earth is this?" a disciple asked curiously, wanting to get closer. His eyes were drawn to the light of the crystal ball, and he involuntarily took a step forward.

"Don't move!" Lin Yu shouted. His voice was full of anxiety and tension.

However, it was too late. As soon as the disciple approached, he was sucked in by an invisible force and stuck tightly to the crystal ball. His body struggled desperately, but he could not break free from the powerful suction.

"Help! Sect Master!" the disciple cried out in terror. His voice was filled with despair and fear, and his face turned pale as paper.

Lin Yu was extremely anxious. He rushed forward without hesitation, trying to cut off the power with his sword. The blade slashed through the air, emitting a cold light, but it was ineffective. The power seemed indestructible, and the sword's attack was like a stone sinking into the sea.

"Let's think of a solution together!" Lin Yu shouted. His forehead was covered with sweat and his eyes were full of anxiety.

The disciples cast various spells in an attempt to rescue their trapped companions, but all their attacks were blocked by the power surrounding the crystal ball.

As time passed, the disciple's breath became weaker and weaker.

"Am I just going to watch him like this..." Lin Yu's heart was filled with pain and helplessness.

Just when everyone was in despair, Lin Yu suddenly discovered that the runes on the crystal ball seemed to have changed.

Can they find a way to rescue their disciples and uncover the mystery of the crystal ball?