Starting with the Immortal Cultivation System, what can you use to fight me?

Mo Beixuan nodded slightly, then turned around, looked at the Witch King calmly, and said lightly: "Come on, trash, let me see how many moves you can withstand in my hands."

"Hmph, arrogant man, today I will let you see what true despair is!" The Witch King roared angrily, and the black air around him boiled, turning into countless ink-black tentacles, tumbling like a dragon, and rushed straight towards Mo Beixuan.

"Infinite Sword Technique, soaring sword intent!" Mo Beixuan shouted, his figure instantly transformed into a shadow, moving effortlessly through the darkness of the Netherworld Purgatory. The longsword in his hand seemed to merge with the spiritual energy of heaven and earth. Every swing caused the surrounding space to slightly distort. Wherever the sword tip passed, the Netherworld energy was split in two, revealing a clear path of light.

Facing the overwhelming attack of the Witch King's tentacles, Mo Beixuan chose not to confront them head-on. Instead, he maneuvered through them with a dance-like agility, each tap of his sword precisely severing those tentacles imbued with terrifying power. His swordsmanship was swift and accurate, each strike imbued with unfathomable internal strength, causing those tentacles to vanish into nothingness the moment they came into contact with the sword's light.

"This... How is this possible!" A flicker of disbelief crossed the Witch King's eyes upon seeing this. He boasted of being the Lord of the Netherworld, commanding countless Netherworld creatures and powers, yet he had never imagined that today he would be so easily subdued by a seemingly ordinary old man.

"The Way of Wuji lies in the heart, not in the form." Mo Beixuan's voice was unusually calm during the battle, as if he had transcended the constraints of life and death, reaching the highest realm of swordsmanship. His swordsmanship was no longer bound by moves and forms, but rather free-flowing, his sword moving with his heart, each strike aimed directly at the Witch King's vital points.

"Hmph, a mere swordsmanship, you think you can defeat me?" the Witch King roared. He knew that if he couldn't quickly defeat this unexpected opponent, he would be defeated today. So, he no longer held back. The black energy around him began to surge wildly, eventually condensing into a massive black sphere. Thunder and lightning raged within the sphere, as if it contained the power to destroy heaven and earth.

"Netherworld Doomsday Ball!" the Witch King roared, pushing the black ball towards Mo Beixuan. At this moment, the entire Netherworld Purgatory seemed to tremble, and the air was filled with a thick smell of death.

However, facing this blow that was enough to destroy the world, Mo Beixuan just smiled faintly. The long sword in his hand suddenly burst into a dazzling light, and the tip of the sword pointed directly at the black sphere.

"The sword breaks all laws, the infinite returns to one!" With a low shout from Mo Beixuan, the long sword transformed into a dazzling sword light, instantly piercing the black sphere. The lightning and darkness inside the sphere dissipated under the illumination of the sword light, and finally turned into a wisp of green smoke, dissipating into nothingness.

"What kind of swordsmanship is this?" The Witch King's eyes widened, his face filled with disbelief as he watched the scene unfold. He had never imagined that a strike he had put all his might into could be so easily broken.

"You're just trash, you don't deserve to know!" Mo Beixuan snorted coldly, and rushed forward again, his sword flashing like a shadow, each strike accurately hitting the Witch King's vital points. Although startled, the Witch King remained calm and quickly mobilized the remaining Netherworld power within his body, forming a series of pitch-black shields in an attempt to block Mo Beixuan's unstoppable sword force.

But Mo Beixuan's Wuji swordsmanship has reached perfection, and his sword intent is above all tangible things.

His figure was graceful, and wherever the tip of his sword pointed, both the shield and the black energy were easily penetrated as if they were made of paper, leaving behind shocking cracks. The Witch King's expression became increasingly grim, and he realized that today he might have truly encountered his greatest enemy.

"Who are you? Why do you have such swordsmanship?" The Witch King asked while fighting, his voice full of fear and unwillingness.

"Rubbish, it doesn't matter if you tell me, I am the Ultimate Sword Master - Mo Beixuan!" Mo Beixuan's voice echoed in the Netherworld Purgatory with an unquestionable domineering aura, as if even the darkness around it trembled.

As soon as these words were spoken, Zi Yu Zhenren and others who were recovering from their injuries on the side were all shocked. Although they knew that Mo Beixuan was extraordinary, they never thought that he was the world-famous Wuji Sword Master.

Wuji Jianzun, this name is like a myth in the world of cultivation. It is said that his swordsmanship has reached the highest level. With one strike of his sword, the wind and clouds change, and all things submit.

"The Infinite Sword Master... the one who was number one in the Dao realm a hundred years ago!" Master Huikong murmured, a hint of enlightenment and awe flashing in his eyes.

Master Wang Ye's face was filled with excitement, and he gripped his sword even tighter. Lightning danced on the tip of his sword, as if sensing his master's high fighting spirit. "Haha, with this senior here, why should we fear the Netherworld Witch King?"

Zhang Daoxuan and Master Zi Yu smiled at each other, feeling relieved.

"You... you're actually the supreme master of the Dao realm a hundred years ago, the Infinite Sword Master Mo—Bei Xuan!" The Witch King's voice trembled, each word laced between his teeth, his eyes filled with fear and despair. He had originally believed himself invincible in this netherworld purgatory, but he had never expected to encounter such a formidable opponent today.

"Yes, it's me." Mo Beixuan smiled calmly, and with a flick of his sword, another sharp sword beam pierced through the void, heading straight for the Witch King's face. The Witch King barely dodged the blow, his body stumbling, and the black energy became chaotic.

"Isn't it said that you entered a secret realm and never came out again? Why do you appear here?" The Witch King was panting, his voice full of confusion and unwillingness.

"You've talked too much!" Mo Beixuan said coldly.

He did not directly answer the Witch King's question, but suddenly rose up again, and shuttled through every corner of the Netherworld Purgatory like a ghost, with the sword flashing, and every time he swung the sword, the space trembled slightly, as if even time had stopped.

The Witch King was forced to retreat again and again. Although the black energy was thick, it seemed so fragile in front of Mo Beixuan's indestructible sword intent.

"Hmph, you think you can get me to surrender like this? I, the Witch King, am not so easily defeated!" The Witch King roared, his voice laced with resentment and madness. He gritted his teeth, and the black energy within him boiled to its peak. The entire Netherworld seemed to tremble with his rage.

"Blood sacrifice in the underworld, all souls return to one!" The Witch King roared, suddenly opened his hands, and black air surged out like a tide, quickly gathering into a huge black net, covering Mo Beixuan and the surrounding space.

This giant net is composed of the resentment and souls of countless underworld creatures. Once trapped, one will be swallowed by endless darkness and despair.

However, facing this seemingly unsolvable attack, Mo Beixuan just smiled slightly. He closed his eyes and concentrated, with sword energy surrounding him, as if he had merged with the spiritual energy between heaven and earth.

"The infinite sword heart is invulnerable to all attacks!" He growled, and lightly tapped the tip of his sword. A dazzling sword light burst out from his body, instantly tearing the huge black net into countless pieces.

The Witch King's face changed drastically when he saw this. He never expected that the attack he had used all his strength could be broken so easily.