The Immortal Physician's Transmigration: Miraculous Rejuvenation

Following the clues, Ye Yuanchen and the others ventured deeper into the Spirit Realm, the location of the source of darkness and the crucial battlefield that would determine the fate of the Spirit Realm. The further they went, the denser the surrounding darkness became. The once bright sky of the Spirit Realm was gradually obscured by dark clouds, and sunlight struggled to penetrate the clouds, casting a few weak rays that were quickly swallowed by the darkness.

"Everyone be careful. The dark forces here have begun to erode the natural order of the spirit realm. We are about to enter the dangerous core area." Ye Yuanchen held his immortal sword, the blade trembling slightly, as if sensing the powerful dark forces around him.

Mu Wanyue tightened her grip on the spirit whip, her gaze sweeping warily around her. "These dark auras make me feel extremely oppressed, as if countless eyes are watching us from the shadows."

Lu Zixuan continuously set up small detection arrays at the front of the group. The faint light emitted by the arrays flickered in the darkness like starlight. "According to the feedback from the arrays, the dark power ahead is extremely unstable and contains many hidden traps and restrictions. We must be extra careful."

Bai Youruo played her spirit flute, and the sound transformed into a sonic shield, enveloping everyone and resisting the corrosive influence of the dark aura. "What secrets does this source of darkness hold, and why does it possess such immense power?"

While traversing a dark forest, they encountered the first wave of dark creatures. These creatures resembled enormous black panthers, their bodies radiating a ghostly black light, their eyes like two burning black flames. They moved swiftly and freely through the trees, instantly surrounding Ye Yuanchen and his companions.

Ye Yuanchen launched the first attack, unleashing the "Spirit Realm Radiant Sun Soul-Shattering Technique," a golden blade of light slashing towards the pack of dark panthers. However, these panthers were extremely agile, easily dodging the attack and quickly launching a counterattack. They opened their blood-red maws, spewing out beams of black energy. Wherever these energy beams passed, trees withered instantly, and the ground was corroded into large craters.

Mu Wanyue wielded her spirit whip, which, like a nimble dragon, drew graceful arcs in the air, attempting to entangle the limbs of the dark panthers. However, the panthers' fur seemed to possess special defensive capabilities; when the spirit whip struck it, it only sparked a few black flames.

Seeing the situation was dire, Lu Zixuan quickly set up a defensive formation, the "Spirit Realm Star Shield Formation." Once the formation was complete, spiritual energy shields rose around them, blocking the dark panthers' attacks. Simultaneously, he set up offensive runes within the formation, unleashing a barrage of spiritual energy arrows towards the panther pack.

Bai Youruo played her spirit flute, the notes transforming into sonic blades that sliced ​​through the souls of the dark panthers. Under the sonic attack, the panthers' movements became sluggish, and the accuracy of their attacks was greatly reduced.

Taking advantage of the opportunity, Ye Yuanchen observed the movement patterns of the dark panthers. He discovered that although these panthers were fast and powerful, there were slight gaps in their coordination. He seized the moment and unleashed his "Spiritual Light Shield-Piercing Thrust," a slender yet sharp beam of spiritual energy shooting from his hand, accurately piercing through the gaps in the panthers' coordination and striking one of them in a vital spot. The panther let out a painful roar, collapsed to the ground, and vanished in a cloud of black smoke.

Seeing their companion injured, the other black panthers became even more frenzied. Ignoring their own casualties, they continued their fierce attacks on Ye Yuanchen and his group. During the intense battle, Mu Wanyue discovered that the panthers' eyes were their weakness. Each time they attacked, their eyes would briefly flicker, revealing a vulnerability.

"Attack their eyes!" Mu Wanyue shouted.

Upon hearing this, everyone focused their attacks on the dark panther's eyes. With their combined efforts, they successfully repelled the dark creatures. But before they could even catch their breath, they discovered a massive dark vortex ahead.

This dark vortex emitted a powerful suction force, constantly drawing everything around it into it. Ye Yuanchen and the others felt the terrifying power of the dark vortex. They tried to move away, but found that the surrounding space seemed to be distorted by dark power, making movement extremely difficult.

"This is one of the defensive traps of the Dark Source. We must find a way to break through it, otherwise we will be drawn into it and suffer eternal damnation," Ye Yuanchen said solemnly.

He calmed himself and used his spiritual sense to delve deeper into the structure of the dark vortex. After some effort, he discovered a core rune at the center of the vortex, the key to maintaining its operation. Destroying this rune would break the dark vortex.

Ye Yuanchen shared his discovery with everyone, and then they began to devise a plan to break the spell. Lu Zixuan set up a special breaking formation on the battlefield, the "Spirit Realm Rune Disintegration Formation," which could counteract the dark runes. Mu Wanyue and Bai Youruo were responsible for providing Ye Yuanchen with spiritual power support and cover, allowing him to approach the center of the dark vortex and destroy the core runes.

Ye Yuanchen took a deep breath and unleashed a celestial technique capable of resisting the pull of darkness, the "Spirit Realm Purifying Wind Body Control Technique," before rushing towards the center of the dark vortex. As he approached the center, he encountered countless attacks from dark energy, but relying on his powerful celestial technique and unwavering faith, he persevered step by step.

When he finally reached the core rune, he unleashed a full-force attack. A golden beam of light, imbued with the power of light and purification, shot from his hand and struck the core rune directly. In a dazzling flash of light and a powerful surge of energy, the core rune was destroyed, and the dark vortex dissipated.

Continuing onward, they arrived at the foot of a dark castle. The castle exuded a dense aura of darkness, surrounded by powerful protective barriers and statues of various dark creatures. Ye Yuanchen and the others knew that the source of darkness lay within this castle.

They cautiously approached the castle, trying to find an entrance. On one side of the castle, they discovered a hidden stone door. The door was covered with various dark runes and patterns, exuding a dangerous aura.

Ye Yuanchen stepped forward again to study the restrictions on the stone gate. He discovered that these restrictions were different from those he had encountered before; they seemed to be living restrictions, capable of automatically adjusting their defensive strategies based on external attacks. After some thought, he decided to try to break the restrictions using a method that combined the power of light, the power of the soul, and immortal medical techniques.

He infused his soul power into the immortal sword, then employed the principles of immortal healing techniques, using spiritual energy to create silver needles and rapidly piercing small holes in the stone gate's seal. With each hole, he channeled a ray of light into it. Under his manipulation, the stone gate's seal gradually began to loosen.

Mu Wanyue, Lu Zixuan, and Bai Youruo also used their immortal techniques to help Ye Yuanchen break the restriction. After a lot of hard work, the stone door finally opened slowly.

They entered the castle, which contained a vast, dark hall. In the center of the hall stood a huge dark crystal ball, from which dark power constantly surged, connecting every corner of the castle through beams of black light.

“This is the source of darkness. We must find its weakness and destroy it,” Ye Yuanchen said.

However, just as they approached the dark crystal ball, a group of dark guards suddenly surged out from all around. These guards were tall, their entire bodies covered in black armor, wielding dark longswords, and their eyes exuding coldness and evil.

Ye Yuanchen and the others immediately prepared for battle, knowing it would be an extremely difficult fight. But they did not flinch, for they bore the mission of saving the Spirit Realm. In the battle, they would utilize their learned immortal techniques, formations, soul power, and spiritual sound techniques to engage in a desperate struggle against the Dark Guardians, seeking an opportunity to destroy the source of darkness.