Their steps passed through the open gate formed by the artifact's power, leading them into a dark, mysterious world. The light surrounding them gradually faded, replaced by a dark purple sky and swirling thick clouds above. The ground beneath their feet trembled and was covered with ruins.
"This… is much worse than I imagined," Nai Seng whispered, looking around with concern.
"If we want to save this world," said Sai Fan, "we need to find out what's waiting here."
Sei Fun observed the surroundings. "The energy here is very strong. But I can sense something isn't right. There's a dark force behind all this."
They moved slowly across the harsh, debris-strewn ground. They knew that if they didn't find the center of this power soon, the evil force would rise again and destroy everything.
Suddenly, from the shadows, a large figure with dark skin and glowing red eyes appeared. The figure stepped forward heavily, casting a long shadow on the ground.
"Who is he?" Nai Seng whispered.
"He… seems to be a demon commander," replied Sai Fan, looking sharply. "We must be careful."
The creature stopped a few steps away from them, its voice echoing loudly and menacingly. "You think you can enter this world and take the power without consequences? I am the last guardian of this power, and I won't let you go any further!"
"Then we have to fight," Sai Fan said, raising his sword. "We have a mission, and we won't back down."
The creature swung its large claws and unleashed waves of dark energy. They prepared for battle. Nai Seng fired blue energy at the creature, while Sei Fun swung his sword with full strength. Sai Fan directed his golden aura, trying to attack from another angle.
This fight was far more intense than before. The creature was incredibly strong, its power seemingly unstoppable. It released attacks that obscured their view, covering the ground and sky with dark energy.
"If we're not careful, we'll lose," Nai Seng shouted, channeling her magic energy.
"Fight him with our own strength!" Sai Fan responded. "We must unite!"
With teamwork and courage, they finally managed to weaken the creature. Sai Fan launched a final attack, swinging his sword into the creature's chest and releasing a large burst of golden energy. The creature roared loudly, then slowly disappeared in a dazzling energy explosion.
The area fell silent, only their heavy breathing audible. They knew this was just the beginning of their struggle in this world.
"If we want to master the power here," Nai Seng whispered, "we need to find the center—the place where the greatest energy gathers."
Sei Fun looked toward a large building that resembled a tall tower rising amidst the ruins. "That's the place," he said. "That's where we'll find the secret of the main power."
They began approaching the tower, but suddenly, from a distance, they heard a loud rumbling. The sound grew nearer, and from the shadows, another creature appeared—bigger and more terrifying than before.
"Again?" Nai Seng exclaimed.
"Get ready!" Sai Fan raised his sword, prepared to face the new enemy.
The creature leapt toward them, with sharp claws and a massive body trembling as it moved. They immediately united, ready to fight with all their strength. The battle erupted again, testing their bravery and power.
"If we want to win," Sai Fan shouted, "we have to use all our magic power!"
Nai Seng raised her staff, gathering blue energy, while Sei Fun swung his sword with courage. They helped each other, launching attacks from different sides.
The fight was fierce. The creature was very strong and aggressive, trying to hold them back. But through teamwork and bravery, they finally managed to weaken the beast and drive it away from the top of the tower.
As the creature vanished, they saw a large glowing crystal at the tower's peak. The crystal radiated incredible energy, indicating they were getting closer to the secret of the main power.
"This is it," Sai Fan said, pointing at the crystal. "We need to touch it and activate this power."
But just as they approached, another figure emerged from the shadows—a large demon with red eyes watching from afar. He was a more powerful and dangerous demon king than any they had faced before.
"Not so easily," the demon king's voice thundered across the top of the tower. "You will never take my power."
Another great battle ensued. They had to fight against an enemy far mightier, with courage and fierce determination. They knew this was the final battle to save their world.