Mu Yang was also busy. He cast a fire spell, and a blazing fire burned in the darkness, trying to disperse the shadow. But the shadow seemed to have a certain resistance to the flames, moving freely in the flames, unmoved.

"Uncle, use fire spells to attack the source of the dark power, don't worry about these dark shadows!" Mu Li shouted. She knew that activating the runes was the top priority at the moment, and someone had to restrain the dark power.

Upon hearing this, Mu Yang immediately turned around, condensing all his flame power into a massive fireball, and blasted it towards the point where the dark power was surging. The fireball traced a bright trail through the darkness before crashing heavily to the ground. With a loud bang, a large crater was blasted into the ground, temporarily curbing the outflow of the dark power.

Taking advantage of this brief pause, Mu Li focused all her energy and quickly activated the last few runes. The moment the runes activated, the magic circle shone brightly, pushing the dark forces and shadows back several feet. A mysterious treasure slowly rose, hovering at the center of the magic circle, emitting a multicolored light that blended with the light of the magic circle.

However, the dark forces refused to accept defeat and attacked frantically once again. The shadows also became more frantic, desperately rushing towards Mu Li, trying to interrupt the sealing ceremony.

Mo Xi knew that Mu Li couldn't be disturbed at this moment. He flew in front of Mu Li and cast the strongest defensive spell in the underworld. A black shield enveloped him and Mu Li. The shadows collided with the shield, making a "sizzling" sound. The shield trembled slightly, but Mo Xi gritted his teeth and tried his best to keep it stable.

Mu Yang, on the side, continuously cast various spells, attacking the dark forces and shadows, attempting to relieve the pressure on Mo Xi and Mu Li. He combined fire with the Yin energy of the underworld, creating a strange black flame that had a stronger inhibitory effect on shadows and dark forces. The black flames raged in the darkness, and when the shadows were touched by the flames, they wailed in pain and their forms became ethereal.

Just as the seal was about to be completed, an angry roar suddenly rang out from the darkness: "You damned ants, how dare you ruin my good deeds!" Following the voice, a massive figure slowly emerged. It was none other than the black-robed man's mysterious master. His entire body was shrouded in darkness, his face invisible. Only a pair of eyes, gleaming blood-red, revealed themselves, emitting endless malice.

"It seems that this is the real big trouble." Mo Xi looked at the mysterious master, and an unprecedented pressure surged in his heart, but his eyes remained firm.

The mysterious master waved his hand, and a black beam shot towards the magic circle, targeting the mysterious treasure being sealed. Seeing this, Mo Xi jumped up without hesitation, blocking the beam with his body. The beam hit Mo Xi, and his body was instantly enveloped by dark power, and blood spurted from his mouth.

"Brother Mo Xi!" Mu Li and Mu Yang exclaimed at the same time.

Mu Li was terrified, but she knew she couldn't stop the sealing now. Tears welling in her eyes, she continued the sealing ritual. The mysterious treasure's radiance grew stronger and stronger, until finally, the seal was complete. A massive pillar of light shot up into the sky, completely sealing the source of the chaos in the Yin-Yang realm.

As the seal was completed, the mysterious master roared with resentment, and the dark power in his body instantly erupted, sweeping towards Mo Xi and the other two...