As the dark shadows dissipated, the light emitted by the "Heart of the Frost Source" grew increasingly gentle and warm, like the warm spring sun, gradually spreading throughout the entire purification core. Su Yao and Ling Yu were exhausted, but their faces were filled with relieved smiles.

"We succeeded. The world is saved," Ling Yu said softly, his voice filled with the relief of surviving a catastrophe. Su Yao nodded slightly; her system was rapidly detecting the energy status of the "Heart of the Frost Source."

“It’s not completely over yet. We need to guide this purified energy to rebalance the world,” Su Yao said. Her system showed that the energy of the “Heart of the Cold Source” needed to be transmitted to various corners of the world through specific channels, but most of these channels had been damaged during the long disaster and needed to be repaired.

Without hesitation, the two immediately began their operation. Su Yao used her spatial abilities to locate the damaged passage, her consciousness traversing different spatial dimensions with her powers. In a distorted spatial region, she found the first damaged passage. The passage resembled torn silk, with energy constantly leaking from it.

Su Yao focused her mind, attempting to mend the passage using her spatial powers. However, this was no easy task; the leaking energy interfered with her abilities, making each attempt feel like going against the current. Ling Yu assisted her, using his ice-based abilities to temporarily freeze the leaking energy, creating a relatively stable environment for Su Yao.

After numerous efforts, the first channel was finally repaired, and the purified energy began to flow slowly. However, many other channels still awaited repair, and they rushed to the next damaged point without stopping.

During the repair process, they encountered some residual extremely cold energy. This energy formed small energy storms that raged near the passage. Su Yao and Ling Yu had to deal with these energy storms first.

Su Yao activated her spatial abilities, creating energy shields to protect herself and Ling Yu. Ling Yu, in turn, unleashed ice-based attacks, attempting to break through the core of the energy storm. However, the power of the energy storm exceeded their expectations, and the shields teetered on the brink of collapse under its impact.

“We need to find the storm’s weak point,” Su Yao said. She analyzed the storm’s energy flow through the system and discovered that the energy at the storm’s base was relatively weak. Therefore, they adjusted their strategy: Ling Yu attracted the storm’s attention from above, while Su Yao used spatial teleportation to reach the storm’s base and unleash a powerful spatial compression, successfully disintegrating the energy storm.

After resolving the energy storm, they continued repairing the passages. As more and more passages were repaired, the world's temperature began to gradually rise. The distant ice and snow began to melt, the rivers thawed, and the earth regained its vitality.

But in repairing the last few key passages, they encountered a new problem. These passages were blocked by a mysterious sealing force, a protective mechanism seemingly left over from ancient times, which had now become an obstacle.

Su Yao's system analyzed the sealing power and discovered that a specific combination of runes was needed to break it. They searched the surrounding area for clues and finally found relevant rune information on the wall of an ancient ruin.

Following the rune information, Su Yao and Ling Yu began drawing runes to activate the process of breaking the seal. The sealing power gradually weakened under the influence of the runes, allowing the repair work on the passage to continue.

When the last passage was repaired, the energy of the "Heart of the Cold Source" surged like a mighty river, flowing to every corner of the world. Warm sunlight bathed the earth, the ice and snow melted away, plants began to grow again, and animals awoke from hibernation. Cheers echoed through human settlements as people felt the end of the apocalyptic cold.

Su Yao and Ling Yu stood atop the snow-capped mountain, overlooking this reborn world. They knew that a new era was about to begin, and their legend would be remembered forever.