Ning Yu hesitated. He knew Mu Xue was right, but he couldn't bear to abandon her and risk his life alone. "But..."
"No buts!" Mu Xue interrupted him. "Time is running out!" She looked up at Ning Yu, her eyes filled with trust and determination. "You must live, promise me!"
Ning Yu took a deep breath; he knew he couldn't hesitate any longer.
He carefully placed Mu Xue in a relatively safe corner, behind a huge rock, using some rubble and debris for simple cover.
"Wait for me, I will definitely come back!"
Mu Xue nodded, forcing a smile despite the pain in her ankle. "I'll wait for you."
Ning Yu returned to the barrier, looking at the changed runes with a sense of unease.
He knew that this time he was not only gambling with his own life, but also with Mu Xue's life.
He took the scorching stone out of his pocket; the stone emitted a faint light, as if in response to his determination.
He gripped the stone tightly and walked toward the barrier...
With a soft "click," a small crack appeared on the barrier...
Ning Yu returned to the barrier, where runes danced before his eyes like ghostly scribbles, their complex and ever-changing patterns making him dizzy.
He took a deep breath and tried to calm himself down.
He didn't know if he could break through this time. If he failed, Mu Xue would also be in dire straits because of his failure.
He gripped the stone tightly in his hand, and the stone's scorching heat seemed to transfer a force to him.
"I'll risk it!" Ning Yu gritted his teeth, his gaze fixed on the tiny crack in the barrier.
He recalled the pattern he had discovered earlier: the vibration frequency of the barrier was somehow related to the changes in the runes.
He needs to disrupt the energy flow of the runes with stones at specific moments when the barrier vibrates in order to widen the crack.
"Boom—" Another violent tremor shook the ground even more violently, and rubble kept falling from above.
Ning Yu steadied himself, held his breath, and waited for the best opportunity to arrive.
"Now!" Ning Yu thought to himself, and he suddenly threw the stone in his hand toward the crack in the barrier.
The moment the stone made contact with the barrier, it emitted a piercing friction sound, and a strong energy wave spread outwards.
The cracks widened at a visible speed, but at the same time, the runes on the barrier began to flash wildly, emitting a dazzling light.
"Not good!" Ning Yu thought to himself as he felt a powerful suction force coming from the barrier.
He instinctively tried to back away, but found that his feet seemed to be nailed to the spot, unable to move.
"Ning Yu!" Mu Xue's anxious voice came from behind. She struggled to stand up, but fell again because of the pain in her ankle.
Ning Yu turned to look at Mu Xue, his eyes filled with worry and self-blame.
He cannot fall; he must find a way to break through the barrier, or they will all perish here.
The cracks grew larger and larger, and the light on the barrier grew stronger and stronger, as if it were about to explode at any moment.
Ning Yu felt his body getting lighter and lighter, as if he was about to be sucked into the barrier.
He gritted his teeth, concentrated his supernatural power in his hand, and prepared to fight to the death.
"Mu Xue... wait for me..." Ning Yu whispered, then reached out and touched the barrier...
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