The Immortal Physician's Transmigration: Miraculous Rejuvenation

As the Spirit Realm gradually prospered and the Three Realms Alliance operated smoothly, Ye Yuanchen and his companions did not cease their exploration. One day, while cultivating in an ancient ruin in the Spirit Realm, Ye Yuanchen accidentally sensed a mysterious and faint fluctuation of spiritual energy. This fluctuation was completely different from the spiritual energy he had encountered before; it seemed to contain some ancient and powerful force, quietly beckoning him.

"This fluctuation of spiritual energy... seems to conceal a secret unknown to others," Ye Yuanchen murmured to himself, a hint of curiosity and wariness in his eyes. He stood up and slowly walked in the direction of the fluctuation of spiritual energy, the Spirit Void Holy Sword in his hand trembling slightly, as if it too could sense the presence of this mysterious power.

Mu Wanyue, Lu Zixuan, and Bai Youruo noticed Ye Yuanchen's unusual behavior and rushed over. "Yuanchen, what happened?" Mu Wanyue asked with concern.

Ye Yuanchen shared his discovery with everyone, who all looked surprised. "This might be a major opportunity, or it might hide unknown dangers, but we can't miss it," Lu Zixuan said, his eyes gleaming with excitement. He was always filled with a desire to explore the unknown and mysterious.

The group cautiously followed Ye Yuanchen, passing through ancient and dilapidated stone gates and navigating traps and mechanisms, finally arriving at the depths of the ruins. There, they discovered a crystal ball radiating a soft light. Something seemed to be sealed within the crystal ball, and the mysterious spiritual energy fluctuations emanated from it.

"What exactly is sealed inside this crystal ball?" Mu Wanyue looked at the crystal ball with a puzzled expression, her heart filled with curiosity.

Ye Yuanchen approached the crystal ball, observing it closely. Suddenly, a beam of light shot out from the crystal ball, directly entering his mind. Ye Yuanchen felt a wave of dizziness, followed by a flood of information entering his mind. It turned out that this crystal ball sealed the inherited memories of an ancient powerful being. This being had fought a breathtaking battle against the forces of darkness in ancient times, ultimately defeating them, but sustaining severe injuries himself. Before his death, he sealed all his life's learning and cultivation insights within this crystal ball, awaiting a destined person to inherit his mantle and continue protecting the Three Realms.

"This is actually a legacy!" Ye Yuanchen exclaimed excitedly, his eyes filled with surprise and awe. "This legacy plays a vital role in improving our strength and protecting the Three Realms. We must comprehend it carefully."

Upon hearing this, everyone was happy for Ye Yuanchen. However, they also knew that this inheritance was not easily obtained. The inherited memories showed that to fully accept this inheritance, one needed to pass three trials set by a powerful being.

The first trial was the Illusion of Inner Demons. Ye Yuanchen entered an illusion constructed of spiritual energy. Within this illusion, his deepest fears, desires, and obsessions were amplified infinitely, transforming into vivid phantoms that attacked him. Ye Yuanchen steadfastly guarded his mind, struggling within the illusion with unwavering will and a persistent pursuit of justice. He constantly recalled his battles against the forces of darkness and the suffering endured by all beings in the Three Realms; these memories became a powerful driving force for him to overcome his inner demons. After a fierce battle, Ye Yuanchen finally broke through the Illusion of Inner Demons, and his state of mind was greatly elevated as a result.

The second trial was the tempering of spiritual energy. Ye Yuanchen needed to endure the baptism and impact of this violent spiritual energy in a space filled with it, fusing his own spiritual energy with this raging force to increase its purity and intensity. The violent spiritual energy was like sharp blades, constantly cutting into Ye Yuanchen's body and meridians, but he gritted his teeth, enduring the excruciating pain, circulating his cultivation technique, and guiding the spiritual energy through his body. During this process, he fainted several times due to the impact of the spiritual energy, but each time he awoke, he persevered. Finally, his spiritual energy gradually merged with the violent spiritual energy, successfully completing the tempering process.

The third test was a real combat duel. Ye Yuanchen had to engage in a life-or-death battle with a guardian spirit formed from the residual spiritual power of a powerful being. The guardian spirit possessed immense strength and rich combat experience, unleashing a variety of exquisite immortal techniques and martial arts skills in a fierce attack on Ye Yuanchen. Undeterred, Ye Yuanchen used the immortal techniques and combat skills he had learned from his inherited memories, engaging the guardian spirit in a fierce clash. During the battle, he constantly summarized his experiences, searching for the guardian spirit's weaknesses, and finally seized the opportunity to deliver a fatal blow, successfully defeating the guardian spirit.

Having undergone three trials, Ye Yuanchen finally fully accepted the inheritance of the ancient powerful being. His strength underwent a qualitative leap; he not only mastered many powerful immortal techniques and martial arts skills, but also gained a deeper understanding of the use of spiritual power.

"Congratulations, Yuan Chen, on obtaining such a powerful inheritance." Mu Wanyue and the others congratulated Ye Yuan Chen, their faces beaming with joy.

Looking at everyone, Ye Yuanchen was filled with gratitude: "This inheritance is not only my personal wealth, but also a powerful weapon for us to protect the Three Realms. I will share the knowledge I have learned with everyone, so that we can improve our strength together and ensure the peace and tranquility of the Three Realms."

In the days that followed, Ye Yuanchen imparted the knowledge and skills he had gained from the inheritance to Mu Wanyue, Lu Zixuan, and Bai Youruo, and everyone's strength improved significantly. They knew that although the dark forces had been temporarily repelled, the road ahead was long, and they must continue to work hard to improve their strength in order to cope with various possible crises and safeguard the peace and prosperity of the Three Realms.