The stone door slowly opened. Amid the light, the mysterious person in the black and gold battle armor stood like a demonic god. The terrifying aura gushed out like a tide, suppressing everyone to the point where they could hardly catch their breaths. Ye Chen stared fixedly at this mysterious person, but his heart sank. From the vast fluctuation of spiritual energy emanating from this person, he knew that this would undoubtedly be an extremely difficult and fierce battle. "Humph, you insignificant beings dare to attempt to lay hands on the treasures here. You truly don't know your limits!" The mysterious person's voice was like thunder exploding, reverberating in this spacious ruin. Ye Chen took a deep breath and stepped forward, saying loudly, "Senior, we only seek that sliver of opportunity. If the senior can be lenient, Ye Chen will surely remember this great kindness." The mysterious person merely sneered, "Stop the nonsense and let's see the real skills!" Before the words finished, the mysterious person pushed both hands forcefully, and an immense spiritual energy storm instantly swept over. Wherever it passed, the space seemed to be distorted. Ye Chen's expression condensed. With a low shout, the spiritual skill "Breeze Shield" was instantly executed. A layer of pale cyan light emerged in front of him, like a tough barrier. The others also hurriedly executed their respective defense methods, struggling to hold on in this violent spiritual energy storm. As the storm gradually subsided, Ye Chen's figure was like lightning, taking the lead to attack the mysterious person. The long sword in his hand was brandished, and the sword shadows were numerous. Each sword shadow carried a sharp aura, stabbing towards the mysterious person as if it were substantial. The mysterious person, however, was unhurried and casually waved his hand, easily dissolving Ye Chen's fierce attack. "Is this just your petty trick?" The mysterious person's mouth curled into a disdainful sneer. Ye Chen gritted his teeth, and the spiritual energy within him surged frantically. He once again executed an even more powerful spiritual skill, "Star Sword Technique". On the sword, the stars were brilliant. With each stab of the sword, it seemed to carry the power of the stars, with astonishing might. Finally, a glint of surprise flashed in the mysterious person's eyes, and he began to deal with Ye Chen's attack seriously. For a moment, the sword shadows and palm winds intersected, and the ripples produced by the collision of spiritual energy continuously spread in the air. Ye Chen concentrated fully, exerting his swordsmanship to the extreme. Each move and each style poured all his strength and determination. However, the mysterious person's strength was simply too powerful. The attacks became more and more fierce, and Ye Chen gradually felt powerless. His breathing became rapid, and sweat rained down from his forehead. Just then, the mysterious person suddenly slapped out a palm. A black light was like a ferocious python, roaring towards Ye Chen. Ye Chen's heart was greatly startled. His footsteps moved rapidly, and he executed the "Phantom Step". His figure instantly became illusory and faintly discernible, narrowly avoiding this fatal strike. But the mysterious person's attacks were like a storm, continuous and unending, not giving Ye Chen the slightest chance to catch his breath. Ye Chen knew that such passive defense was not a long-term solution. He must find the opponent's flaw to have a glimmer of hope. While desperately resisting the mysterious person's attacks, his gaze was like lightning, carefully observing the opponent's every move. Finally, Ye Chen discovered that after each time the mysterious person executed a powerful attack, there would be a moment when the fluctuation of spiritual energy was unstable. A glint of sharpness flashed in Ye Chen's eyes. He made a prompt decision, gathering all the spiritual energy within his body and executing the strongest strike, "Nine Suns Burning Heaven Sword". On the long sword, flames were burning furiously. The scorching high temperature seemed to be able to turn everything into ashes. The mysterious person sensed the terrifying power of this strike, and his expression slightly changed. He hurriedly defended with all his strength. But this time, Ye Chen's attack was overwhelming, forcefully breaking through the mysterious person's defense and leaving a deep sword mark on his body. The mysterious person shouted angrily, and the spiritual energy on his body suddenly erupted, forcefully shaking Ye Chen back dozens of steps. A wisp of blood trickled from the corner of Ye Chen's mouth, and his body trembled slightly, but his gaze remained steadfast. "Kid, you do have some skills. I have to look at you in a new light!" The mysterious person snorted. Ye Chen wiped the blood from the corner of his mouth and gritted his teeth, "Senior, the battle is not over yet!" The mysterious person looked up and laughed loudly, "Good, then let's continue!" The battle became even more intense. The entire ruin trembled violently under the violent impact of the spiritual energy of the two. Ye Chen constantly changed tactics, circling with the mysterious person. Just when the two sides were in a stalemate, Ye Chen suddenly recalled a mysterious spiritual skill that he had obtained by chance in the ruin. He made up his mind and decided to take a risky try. Ye Chen closed his eyes tightly and fully mobilized the spiritual energy within his body, slowly operating according to the method of that mysterious spiritual skill. The mysterious person keenly sensed Ye Chen's change, and a sense of unease couldn't help but well up in his heart. After a moment, Ye Chen suddenly opened his eyes, and the light in his eyes was as brilliant as stars. He tightly held the long sword with both hands, and a terrifying force burst out from within his body. "Heaven and Earth Strike!" Ye Chen shouted loudly, brandishing the long sword. A brilliant light shot towards the mysterious person like lightning. The mysterious person's expression changed drastically and defended with all his might. However, the power of this strike far exceeded his imagination. The light instantly penetrated the mysterious person's defense and directly hit his chest. The mysterious person let out a muffled groan and staggered back several steps. "You won..." The mysterious person said slowly, "The treasures belong to you." After saying that, the figure of the mysterious person gradually dissipated. Ye Chen's legs gave way, and he collapsed to the ground, breathing heavily in large gulps. Everyone gathered around, praising Ye Chen's brave performance endlessly. Ye Chen looked at the treasures and cultivation methods and secret manuals all over the ground, but his heart was filled with countless emotions.