Rise of the Otherworld.

Lin Yu rested for a while in the cave and began to carefully study the secret books and magic weapons obtained from the ruins.

The words on the secret book were ancient and obscure, as if they contained endless mysteries. Lin Yu concentrated intently, interpreting it word by word. His brows sometimes furrowed, sometimes relaxed, as if he was having a silent conversation with the secret book. Faint light filtered in from the cracks in the cave ceiling, illuminating his focused face, outlining a resolute outline.

The magic weapon was a jade pendant that emitted a mysterious light and was engraved with exquisite patterns. Lin Yu gently stroked the jade pendant, trying to feel the power contained in it. The jade pendant was warm to the touch, and the light flowed through his fingertips, but it also brought an indescribable sense of strangeness.

The cave was filled with a quiet atmosphere, with only the occasional sound of Lin Yu flipping through the secret book. He was immersed in the ocean of knowledge, forgetting everything in the outside world. Time seemed to freeze, and only his thoughts continued to extend under the guidance of the secret book.

After several hours of study, Lin Yu finally had a preliminary understanding of the secret book. This secret book recorded a profound cultivation method that could greatly improve the purity of the practitioner's spiritual energy and control ability.

"So that's how it is." Lin Yu's eyes flashed with excitement. He adjusted the flow of spiritual energy in his body according to the method in the secret book. At first, he felt very difficult. The spiritual energy was constantly blocked when it flowed through the meridians. Every step forward was like breaking through a thick barrier, and his body was in great pain. But Lin Yu gritted his teeth and persisted without giving up.

Beads of sweat slid down his forehead, his face turned pale, but his eyes became more determined. "Break it for me!" Lin Yu shouted, and the spiritual energy in his body suddenly broke through the obstacles and flowed smoothly in the meridians.

Lin Yu felt a powerful force surging in his body, and he knew that he had succeeded in the first step. However, this was just the beginning. In the following days, Lin Yu practiced day and night, constantly improving and consolidating this new practice method.

The alternation of day and night in the cave meant nothing to him; he was completely immersed in the world of cultivation. Every movement of his spiritual energy was a challenge to his own limits, and every breakthrough was a transcendence of himself.

During the practice, Lin Yu did not forget to study the jade pendant. He found that there seemed to be a powerful power hidden in the jade pendant, but he was unable to stimulate it.

"How can I stimulate the power of this jade pendant?" Lin Yu fell into deep thought. His eyes moved back and forth between the jade pendant and the secret book, trying to find the connection between the two.

He tried various methods, such as injecting spiritual energy and communicating with his mind, but the jade pendant remained unresponsive. Repeated failures frustrated him, but deep down he firmly believed that there must be a way to unlock the jade pendant's secret.

Just when Lin Yu felt a little discouraged, the system's voice sounded: "Host, perhaps you can combine the jade pendant with your cultivation method, and you may make new discoveries."

Lin Yu listened to the system's advice and his heart moved. He picked up the jade pendant again and guided the spiritual energy into it according to the operation of the cultivation method. This time, his heartbeat accelerated with the infusion of spiritual energy, and he nervously anticipated the result.

The jade pendant finally responded. It emitted a dazzling light, and a powerful force surged into Lin Yu's body. Lin Yu felt as if his body was about to burst under this force, and every inch of his skin and every meridian was under tremendous pressure.

He immediately concentrated all his energy on practicing the cultivation method, controlling the power flowing through his body. This was a contest of strength, and also a test of his will.

Under the impact of this force, Lin Yu's meridians continued to widen, and his spiritual energy became more powerful. His body emitted a faint light, and the air around him fluctuated because of this powerful force.

After a painful ordeal, Lin Yu finally succeeded in absorbing this power. He opened his eyes, and a gleam of light flashed in them. At this moment, his aura was restrained, yet he gave people a sense of unfathomable power.

"I feel like my strength has improved qualitatively." Lin Yu clenched his fist, feeling the powerful force in his body. He swung his fist lightly, and the air in the cave made a burst of explosions.

At this time, he had broken through his original realm and reached a new height. But Lin Yu knew that this was far from enough. The outside world was full of dangers and challenges, and he had to become stronger.

After practicing in the cave for a while, Lin Yu decided to leave and return to the sect. He packed his luggage, took a last look at the cave that had accompanied him growing up, and then turned around resolutely.

He walked out of the cave and looked into the distance, his heart filled with anticipation and fighting spirit. The sunlight shone on him, illuminating the way forward.