The Immortal Physician's Transmigration: Miraculous Rejuvenation

As the dark creatures dissipated, Ye Yuanchen and the others did not feel relieved. Instead, they became even more vigilant due to the even stronger dark power emanating from the depths of the valley. After a brief respite, they continued their ascent into the valley, proceeding cautiously with each step, as if stepping into an unknown abyss.

"Everyone be careful. This force is stronger and more malevolent than the ones we've encountered before. We must be on high alert." Ye Yuanchen gripped the Spirit Void Holy Sword tightly, his eyes fixed firmly ahead. His voice was deep and powerful, echoing through the valley and conveying a tense atmosphere.

Mu Wanyue nodded slightly, the Spirit Whip in her hand shimmering with a faint light. The pink whip, like a nimble snake, coiled around her, ready to strike at any moment. "This dark power seems to be hiding some huge conspiracy. We must not let it succeed."

Lu Zixuan followed behind, constantly taking out various detection artifacts from his storage treasure to try and analyze the attributes and origin of this dark power. His face was slightly pale, as the previous battle had injured him, but his eyes remained focused and sharp. "According to my detection, this power seems to be related to some ancient evil entity, possibly an ancient demon god sealed here."

Bai Youruo played the Lingxu Lingyin Flute, the flute's notes transforming into invisible sound waves that spread outwards, probing the road ahead and any hidden dangers. The flute's melody was melodious yet tinged with tension, as if foreshadowing an impending crisis. "Whatever it may be, we must face it, for the peace of the Three Realms."

As they ventured deeper into the valley, a colossal black vortex appeared before them. Lightning flashed and thunder roared within it, black bolts dancing wildly like mad snakes, distorting the surrounding space beyond recognition and radiating a suffocating sense of oppression. At the vortex's center, a blurry, demonic figure flickered in and out of existence, its immense form emanating an aura of endless darkness, as if it were a demon crawling out from the depths of hell.

"Is this the source of that dark power? It looks extremely troublesome." Ye Yuanchen frowned, silently assessing the situation before him. He knew that this would be an extremely difficult battle, and if he was not careful, the Three Realms would be plunged into utter destruction.

The demonic shadow seemed to sense their arrival, letting out a deafening roar. This roar, like a materialized black sound wave, spread outwards, tearing up layers of earth and rocks wherever it went, and creating cracks in the space itself. Ye Yuanchen and the others hurriedly activated their spiritual energy shields to resist the powerful sonic impact.

"Prepare for battle!" Ye Yuanchen shouted, charging towards the demonic shadow first. He unleashed the strongest move of the "Spirit Realm Chaos Suppressing God Technique," the runes on the Spirit Void Holy Sword gleaming with dazzling golden light, and a huge golden blade of light slashed through the sky, heading towards the demonic shadow.

Mu Wanyue followed closely behind, wielding the Spirit Whip and unleashing the immortal technique "Spirit Dance Illusion Whip Void Break". The spirit whip transformed into countless pink rays of light in the air, like a group of flying elves, wrapping around the demonic shadow and attempting to restrict its movements.

Lu Zixuan quickly set up a "Spirit Void Chaos Demon-Slaying Array" on the side. After the array was activated, beams of spiritual energy shot out from the array, raining down densely on the demonic shadow. At the same time, he manipulated the array's spiritual energy fluctuations, attempting to disrupt the demonic shadow's energy gathering.

Bai Youruo played the Spiritual Sound Flute, and the flute's notes transformed into a powerful soul-shaking force that surged towards the core of the demonic shadow's soul. She attempted to use the flute's notes to disrupt the demonic shadow's thinking and create an opening in its attack.

However, the shadowy figure's power far exceeded their expectations. The golden blade of light struck the shadowy figure, but it sank to the bottom of the sea without causing a ripple. The shadowy figure easily broke free from the entanglement of the spirit whip, and the spirit energy arrows that struck it only caused its dark aura to fluctuate slightly. Although the soul impact of the flute music slowed the shadowy figure's movements for a moment, it quickly recovered and launched an even more ferocious counterattack.

The demonic shadow extended a gigantic arm, crackling with black lightning, and slammed it down towards Ye Yuanchen and the others. They hurriedly dodged, but the shadow's attack range was too vast, and they were still affected. Mu Wanyue was blasted away by a powerful force, crashing heavily into the valley's stone wall, coughing up blood. Lu Zixuan's formation was also destroyed by the shadow's attack; he himself suffered internal injuries, his face ashen.

"Wanyue! Lu Zixuan!" Ye Yuanchen exclaimed, his heart filled with worry and anger. He rushed towards the demonic shadow without regard for anything, the Spirit Void Holy Sword in his hand shining brightly, unleashing a forbidden immortal technique he had never tried before—"Spirit Realm Chaos Terminator." This move required a huge consumption of spiritual power and might even cause irreversible damage to himself, but Ye Yuanchen couldn't care less about that at this moment.

As Ye Yuanchen cast his spell, the runes on the Spirit Void Holy Sword shone with unprecedented brilliance, and a blade of light containing boundless chaotic power slashed towards the demonic shadow. Wherever this blade of light touched, space was torn apart, and the surrounding darkness was temporarily dispelled. The demonic shadow seemed to sense the threat of this attack as well; it concentrated all its strength and used both hands to block the blade of light.

The light blade collided with the demonic shadow's hands, producing a deafening roar. The entire valley trembled violently, as if it were about to collapse. Powerful energy waves spread outwards, and Ye Yuanchen and the others were forced back by the force, suffering injuries of varying degrees.

However, although the demonic shadow blocked the attack, its hands were also visibly injured, and its dark aura became somewhat disordered. "We still have a chance, let's all attack together!" Ye Yuanchen said through gritted teeth, enduring the excruciating pain in his body, and charged towards the demonic shadow once more.

Mu Wanyue struggled to her feet, wiped the blood from her mouth, and brandished her Spirit Whip, rejoining the battle. Lu Zixuan also took out some precious pills from his storage treasure, replenishing his spiritual power before rearranging the formation to support Ye Yuanchen and the others. Bai Youruo played her Spirit Flute, the melody becoming even more intense. She poured her soul power into the music, enhancing its effectiveness against the demonic shadows.

With everyone's combined efforts, the demonic shadow gradually showed signs of fatigue. Its attacks became increasingly sluggish, and its dark aura was no longer as intense as before. But it continued to resist stubbornly, refusing to be easily defeated.

"We cannot let our guard down, keep attacking!" Ye Yuanchen shouted, his eyes revealing a firm determination.

Just then, the demonic shadow suddenly roared, and its body began to swell, as if in a final struggle. The surrounding dark energy rapidly converged on it, forming a huge black sphere that enveloped it.

"Oh no, it's going to self-destruct!" Lu Zixuan shouted, his face turning extremely grim.

Ye Yuanchen and the others hurriedly retreated, trying to get away from the demonic shadow. However, the demonic shadow's self-destruction range was too large, and they had no time to escape. In this critical moment, Ye Yuanchen suddenly remembered a defensive magic treasure he had obtained in the mysterious ruins—the "Spirit Void Divine Shield." He immediately took out the Spirit Void Divine Shield from his storage magic treasure and threw it into the air.

The Spirit Void Divine Shield rapidly expanded, forming a massive golden shield that enveloped Ye Yuanchen and the others. Just as the demonic shadow self-destructed, the black sphere collided with the golden shield, producing a deafening explosion. The powerful energy impacted the shield, causing cracks to appear on its surface, as if it might shatter at any moment.

Ye Yuanchen and the others did their utmost to support the shield, continuously pouring their spiritual energy into it. After a difficult resistance, the energy from the demonic shadow's self-destruction gradually dissipated, and the shield held firm at the last moment, without breaking.

"Did we succeed?" Mu Wanyue asked weakly, her face full of exhaustion and scars.

Ye Yuanchen watched the dark aura gradually dissipate before him, and breathed a sigh of relief, but his eyes remained vigilant. "For now, we can consider it a success, but the root of this dark power has not been completely eradicated. We must continue to look for ways to prevent it from reappearing."

Exhausted, the group left the valley. They knew this battle was just the beginning; the road ahead was long, and they needed to recover their strength as soon as possible to find a way to completely eliminate the dark forces in order to truly protect the peace and tranquility of the three realms.