The Immortal Physician's Transmigration: Miraculous Rejuvenation

As Ye Yuanchen and the others stepped out of the Spirit Tower, their strength greatly increased, and their auras became even more composed and profound. At this moment, the Spirit Realm seemed to have unveiled a mysterious veil in their eyes, and more secrets and dangers hidden in the shadows gradually emerged.

In a vast forest of the Spirit Realm, they were searching for new cultivation resources and opportunities. Suddenly, a familiar yet repulsive aura wafted from ahead. Ye Yuanchen's expression changed, and he said warily, "This aura... could it be..."

Before he could finish speaking, a group of figures dressed in black robes slowly emerged from the woods. Leading them was none other than the remnant soul of the Dark Night Demon Lord, who had once wreaked havoc in the cultivation world. It turned out that after being defeated in the cultivation world, the Dark Night Demon Lord's remnant soul had fled to the Spirit Realm, where, with the special energy of the Spirit Realm and the protection of some dark ruins, it had gradually regained some of its strength.

"Ye Yuanchen, I never thought we'd meet again in the Spirit Realm. Today is your death day!" The remnant soul of the Dark Night Demon Lord let out a sinister laugh, his eyes filled with hatred and madness.

Ye Yuanchen's heart sank. He knew that although the remnant soul of the Dark Night Demon Lord was severely injured, it was still not to be underestimated. "Dark Night Demon Lord, you have committed countless evils. Even if you escape to the Spirit Realm, you will not escape the punishment of justice!"

Having said that, Ye Yuanchen launched the first attack. He unleashed the new immortal technique he had comprehended in the Spirit Tower, "Spirit Realm Radiant Sun Soul-Shattering Technique," and a golden blade of light, imbued with the pure spiritual power and light of the Spirit Realm, roared towards the remnant soul of the Dark Night Demon Lord. Wherever this blade of light passed, space itself slightly distorted, demonstrating its immense power.

The remnant soul of the Dark Night Demon Lord snorted coldly, his hands moving rapidly as dark energy gathered before him, forming a black shield. Ye Yuanchen's attack struck the shield, producing a loud boom as the golden blade collided with the black shield, sending up ripples of energy.

Mu Wanyue, Lu Zixuan, and Bai Youruo joined the battle without hesitation. Mu Wanyue wielded her spirit whip, which darted through the black-robed crowd like a nimble dragon, each strike precisely hitting vital points and disrupting their formation. Lu Zixuan swiftly set up a "Spirit Realm Demon-Slaying Array." Once the array was complete, a barrage of spiritual energy arrows, unique to the Spirit Realm, rained down on the remnant soul of the Dark Night Demon Lord and his minions. These arrows not only possessed immense offensive power but also had a certain restraining effect on dark forces. Bai Youruo played her spirit flute, the notes transforming into invisible sonic blades that echoed through the forest, slicing through the souls of her enemies and plunging them into pain and chaos.

However, the remnant soul of the Dark Night Demon Lord seemed to have gained some new power in the Spirit Realm. He unleashed a celestial technique called "Dark Spirit Shadow Clone Technique," and his body instantly split into multiple dark spirit shadows. These spirit shadows were of various shapes, some like ferocious beasts, and others like eerie ghosts, rushing towards Ye Yuanchen and the others.

Seeing this, Ye Yuanchen immediately used a perception technique to try and find the true form of these spirit figures. During the battle, he discovered that although there seemed to be many spirit figures, one of them had the strongest aura and was connected to the original aura of the remnant soul of the Dark Night Demon Lord. He determined that this spirit figure was the true form, so he shifted his focus of attack to this spirit figure.

He unleashed "Spiritual Light Shield Piercing Thrust," a slender yet sharp beam of spiritual energy shooting from his hand, piercing straight at the dark spirit like a blade. The remnant soul of the Dark Night Demon Lord sensed Ye Yuanchen's intention and manipulated the other spirits to stand in front of him, attempting to block Ye Yuanchen's attack.

Seeing this, Mu Wanyue and Bai Youruo coordinated their efforts. Mu Wanyue used a supportive immortal technique, channeling her spiritual power into Ye Yuanchen's body to enhance his attack power. Bai Youruo, on the other hand, played a special flute melody that weakened the dark spirit's defenses, making it easier for Ye Yuanchen's attacks to penetrate.

With their assistance, Ye Yuanchen's "Spiritual Light Shield-Piercing Thrust" successfully pierced through the layers of defense of the dark spirit shadow and struck the true form of the spirit shadow. The remnant soul of the Dark Night Demon Lord let out a painful roar, and after his true form of the spirit shadow was struck, the other spirit shadows also dissipated.

But the remnant soul of the Dark Night Demon Lord did not stop there. In his rage, he unleashed an ultimate dark immortal technique, the "Spirit Realm Dark Night Devouring Curse." The surrounding dark energy rapidly converged, forming a massive black vortex, from which the faint wails of various souls could be heard. This black vortex swept towards Ye Yuanchen and the others, uprooting trees and eroding the land in its wake, as if it intended to devour everything in its path.

Ye Yuanchen sensed the terrifying power of the dark vortex. He knew he had to break the spell as soon as possible. He closed his eyes, calmed his mind, and recalled his insights into the energy of the spirit realm and immortal techniques within the Spirit Tower. Suddenly, an idea struck him. He thought of a method to break the spell by using the natural power of the spirit realm as a guide, and drawing upon the power of everyone's faith and the power of light.

He shouted, "Listen to my command! Gather the power of your faith and the natural power of the spirit world into me, and together we will break this Dark Night Devouring Curse of the Spirit World!"

Mu Wanyue, Lu Zixuan, and Bai Youruo responded one after another, releasing the power of their beliefs in justice, peace, and survival. At the same time, they guided the natural power of the spirit world, transforming it into beams of light that converged on Ye Yuanchen. Ye Yuanchen sensed this powerful force, merging it with his own power of light, and then unleashed a new immortal technique, "Spirit World Light Belief Curse-Breaking Technique."

A massive white light rose from Ye Yuanchen's hand, illuminating the entire forest like a blazing sun. Wherever the white light touched, the black vortex gradually dissipated, and the dark power of the remnant soul of the Dark Night Demon Lord was also gradually dispelled.

The remnant soul of the Dark Night Demon Lord was greatly shocked to see his ultimate immortal technique broken. He knew that his revenge plan in the Spirit Realm was likely doomed. He began to plot his escape, trying to find a new hiding place so that he could rise again in the future.

Ye Yuanchen sensed the Dark Night Demon Lord's remnant soul's intentions; how could he let this demon escape so easily? He said to Mu Wanyue, Lu Zixuan, and Bai Youruo, "We can't let him get away, chase after him!"

So they pursued the remnant soul of the Night Demon Lord in the direction it had fled. During the chase, they traversed the mountains and lakes of the spirit world, passing by some strange spirit tribes and mysterious ruins.

In an ancient valley in the spirit world, they finally caught up with the remnant soul of the Dark Night Demon Lord. At this moment, the remnant soul of the Dark Night Demon Lord was trying to enter a dark cave deep in the valley. This cave exuded a strong dark aura and seemed to hide some great secret.

Ye Yuanchen and the others launched an attack without hesitation, preventing the remnant soul of the Dark Night Demon Lord from entering the cave. They engaged in a fierce battle with the remnant soul of the Dark Night Demon Lord at the entrance of the valley. During the battle, Ye Yuanchen discovered that the valley seemed to have a special spiritual energy restriction. These restrictions interfered with their immortal techniques to some extent, but at the same time, they also limited the dark power of the remnant soul of the Dark Night Demon Lord.

He decided to seize this opportunity to completely defeat the remnant soul of the Dark Night Demon Lord. He used a magical technique called "Spirit Realm Sealing Technique," which was adapted to this special spiritual environment, in an attempt to seal the remnant soul of the Dark Night Demon Lord within the valley.

Mu Wanyue, Lu Zixuan, and Bai Youruo also cooperated fully, using their immortal techniques to assist Ye Yuanchen in setting up the seal. After a period of arduous effort, they finally succeeded in setting up the seal, trapping the remnant soul of the Dark Night Demon Lord in the valley.

Ye Yuanchen and the others breathed a sigh of relief, but they knew this was just a small episode in their adventure in the Spirit Realm. In this Spirit Realm, full of unknowns and dangers, many more challenges and opportunities awaited them. They would continue to explore the Spirit Realm, improve their strength, and contribute their power to maintaining peace and justice.

After leaving the valley, they arrived at a bustling city in the spirit realm. This city was a gathering place for cultivators and spirits from all over the spirit realm, boasting abundant cultivation resources and a unique culture. Ye Yuanchen and his companions decided to stay in this city for a while, to learn more about the spirit realm, make some new friends, and lay a solid foundation for their long-term development in the spirit realm.