Su Yao and Ling Yu struggled to hold on in the dark valley, each second feeling like a tug-of-war with death. The dark power, like a surging black wave, relentlessly assaulted their supernatural defenses, attempting to completely engulf them.

"Su Yao, this can't go on. We need to come up with a more effective strategy." Ling Yu's voice was tinged with fatigue, but his eyes remained firm.

Su Yao bit her lower lip, her mind racing. She activated the system, trying to find a weakness in the dark power. "System, analyze the structure of the dark power and find a breakthrough point!"

"Analyzing... A gap has been detected in the core fluctuations of the dark power. You can attempt a powerful attack on this gap, which has a certain chance of disrupting its stability," the system quickly responded.

A resolute glint flashed in Su Yao's eyes: "Ling Yu, I will use my spatial ability to create a brief still space to freeze the fluctuations of the dark power. You take this opportunity to compress your ice-type ability to its limit and attack its core with all your might."

Ling Yu nodded, took a deep breath, and began to gather his supernatural power. Su Yao, on the other hand, was completely focused, her hands moving as her spatial power formed silver vortexes around her.

"Now!" Su Yao shouted, her spatial ability spreading like a giant silver spiderweb, instantly enveloping a patch of dark power. In that instant, the fluctuations of the dark power seemed to be paused.

Seizing this once-in-a-lifetime opportunity, Ling Yu thrust his hands forward, forming a massive ice-blue energy sphere in his palms. The ice-type power contained within was so potent that it froze the surrounding air. The energy sphere roared towards the core of the dark power, forcibly dispelling the dark mist in its path.

However, after being attacked, the core of the dark power suddenly unleashed an even stronger recoil, sending Ling Yu flying. Seeing this, Su Yao immediately used her spatial abilities to pull Ling Yu back to her side.

"Are you alright?" Su Yao asked with concern.

Ling Yu wiped the blood from the corner of his mouth: "We're not dead yet, but this dark power is more tenacious than we imagined."

Just then, Su Yao's communicator rang. It was a message from the research team: "Su Yao, the neutralization device has been initially developed, but it needs to be activated at the core of the dark power to achieve its maximum effect."

Su Yao looked at Ling Yu, and a sense of determination welled up in both of them. "Let's give it our all!"

Su Yao activated her spatial abilities again, enveloping the neutralization device within it, and then rushed towards the core of the dark power together with Ling Yu. The dark power seemed to sense their intentions and launched a frenzied attack on them.

While dodging the attacks, Su Yao used spatial distortion to alter the trajectory of the dark forces. Ling Yu protected her from the side, using his ice-based abilities to fend off the approaching dark tentacles.

Finally, they approached the core of the dark power. Su Yao pushed the spatial vortex containing the neutralization device toward the core, while Ling Yu released his last ice-type ability to buy time to activate the device.

"Start the device quickly!" Su Yao shouted.

The research team remotely controlled the neutralization device from the base, and it emitted a dazzling light, slowly penetrating the core of the dark power. The dark power began to tremble violently, emitting sharp whistling sounds.

Su Yao and Ling Yu embraced tightly, using their supernatural abilities to resist the final struggle of the dark forces. As the light grew stronger, the dark forces were gradually neutralized and dissipated.

The dark mist in the valley slowly dissipated, revealing a scene riddled with destruction. Su Yao and Ling Yu collapsed wearily onto the ground, but a relieved smile appeared on their faces.

“It’s finally over…” Ling Yu murmured.

Su Yao stood up and looked at the Alliance base in the distance: "No, this is just the beginning. There are many more challenges waiting for us, but as long as we are united, nothing can stop us from surviving in this high-temperature apocalypse."

They returned to the Alliance base with news of their victory, and the people cheered. But Su Yao knew that this was just a small victory in the battle for survival in the high-temperature apocalypse. Countless hardships and obstacles lay ahead for them to overcome, whether it was the cruel test of nature or other unknown threats lurking in the shadows.