After that mysterious power surged into her body, Su Yao's consciousness blurred, as if she were in a world made of light. The surrounding light wrapped around her like threads, continuously pouring energy into her body, and she could feel herself gradually merging with this source of mysterious power.

After an unknown amount of time, Su Yao gradually regained consciousness. She opened her eyes and found herself surrounded by a soft halo of light. Her body, which had been exhausted from the battle, was now full of power, and her supernatural abilities had become stronger and easier to use. She looked at the frozen lake, which had once been the source of the mysterious power, but had now turned into a faintly glowing mark, like a sign left after completing a mission.

Su Yao knew she had to return to the safe house as soon as possible to share the situation and this power with everyone. She turned to leave, but just then, the system sounded an urgent alarm. Su Yao's heart tightened; she saw a large amount of black mist appearing in the direction of the Ice Forest, rapidly spreading towards the frozen lake where she was.

An evil aura emanated from the black mist, and Su Yao could sense the danger it contained. She immediately prepared for battle, her spatial abilities poised to be unleashed. The black mist drew closer, emanating eerie roars that seemed to echo with the howls of countless evil spirits.

Suddenly, countless black tentacles emerged from the black mist. These tentacles, seemingly formed from condensed dark energy, corroded the ice surface, leaving black marks wherever they went. Su Yao used her wind-based ability to create a tornado, attempting to disperse the black tentacles. However, the black tentacles only trembled slightly before continuing their attack on Su Yao.

Su Yao frowned. She fused her fire-based abilities with her newly acquired mysterious power, and a longsword burning with strange flames appeared in her hand. She swung the sword at the black tentacles. This time, when the flames touched the black tentacles, they hissed in pain and began to burn.

But the black mist continued to surge in, and more black tentacles attacked Su Yao from all directions. Su Yao used her spatial abilities to teleport repeatedly, dodging the attacks while searching for the source of the black mist. In the midst of the fierce battle, she discovered that the core of the black mist was deep within the Ice Forest, where an ancient altar shrouded in dark power lay.

Su Yao decided to strike at the heart of the matter, charging towards the core of the black mist. Along the way, she continuously severed black tentacles, and her body was grazed in several places by the black mist, but she persevered with her indomitable will and powerful abilities.

As she approached the ancient altar, a colossal dark demon emerged from it. The demon was enormous, with massive wings and sharp claws, its eyes burning with black flames. It opened its gaping maw and unleashed a wave of black energy towards Su Yao.

Su Yao swiftly erected her supernatural shield, simultaneously combining her mystical power, wind-based abilities, and spatial abilities, instantly appearing behind the dark demon. She raised her longsword and thrust it towards the demon's wings, attempting to restrict its movement. The dark demon reacted with lightning speed, flapping its wings and sending Su Yao flying.

Su Yao steadied herself in mid-air. She knew this dark demon was extremely powerful and she had to go all out. She took out all the light-attribute items she had collected in the ruins from her spatial storage and surrounded them around herself. These light-attribute items, activated by a mysterious power, emitted a dazzling light, exerting a certain suppressive effect on the dark demon.

The dark demon seemed somewhat wary of the light; it roared and launched an even fiercer attack. Under the cover of the light, Su Yao constantly dodged the attacks and searched for the dark demon's weakness. She discovered a black crystal on the dark demon's forehead, which should be the core of its power.

Su Yao concentrated all her power and charged towards the Dark Demon's forehead. The Dark Demon sensed her intention and swung its massive claws at her. Su Yao skillfully used her spatial abilities to dodge, and then, at the moment she was close to the Dark Demon, she gathered all her abilities and light-attribute power into her longsword and thrust it fiercely towards the black crystal on the Dark Demon's forehead.

With a deafening roar, cracks appeared in the black crystal, and the dark demon let out a painful howl. Su Yao pressed her advantage, launching a series of attacks. Finally, the black crystal shattered, and the dark demon's massive body turned into black smoke and dissipated into the air.

As the dark demon vanished, the black mist gradually dissipated. Su Yao sat wearily on the ice. She knew the crisis was temporarily over, but the dangers of the apocalypse remained. After a short rest, she set off towards the safe house, carrying renewed strength and a new mission. She wanted to bring hope to everyone.