Chapter 646: What Secret Lies Hidden!

Li An smiled slightly: "Likewise. But now is not the time to relax. This sea hides a greater secret; we must continue exploring."

Just then, a strange light suddenly appeared in the sky. That light was as brilliant as a rainbow, yet carried an indescribable majesty. It seemed to be calling to them, guiding them toward an unknown place.

"Look, what is that?" Guo Yao pointed at the light in the sky, her face full of surprise.

Li An gazed at that light, a strange excitement surging in his heart: "It seems our journey is far from over. Let's go and see what secret lies behind that light."

The three exchanged glances, their eyes all flashing with determined light. They knew the road ahead might be even harder, but as long as they walked hand in hand, nothing could stop their forward steps.

As they approached that light, the surrounding environment began to undergo subtle changes. The seawater grew even calmer, as if time itself had frozen at this moment. A faint fragrance permeated the air, a call from the Unknown World.

Suddenly, a massive whirlpool formed on the sea surface, spinning wildly as if to suck everything into it. Li An, Guo Yao, and Chen Feng all felt a powerful suction; they had to grip the ship's railing tightly to avoid being dragged into the whirlpool.

"This is... what's happening?" Guo Yao's voice carried a trace of fear.

Li An's gaze was firm: "Whatever it is, we must face it together. Everyone be careful, prepare to meet the unknown challenge!"

The whirlpool's power grew stronger, and the ship began to shake violently. Just then, a beam of light fell from the sky, striking the center of the whirlpool directly. That light seemed to possess miraculous power, instantly dissolving the whirlpool.

With the whirlpool's disappearance, a massive crack appeared on the sea surface, revealing dazzling light from within the fissure. That light seemed to hide another world, a world waiting for them to explore.

"It seems we have arrived at our destination." Li An took a deep breath, his eyes flashing with excitement.

The three exchanged smiles and, without hesitation, jumped into that crack. Their figures vanished in the light, leaving only the gradually healing crack on the sea surface to witness their brave and fearless journey.

When they opened their eyes again, they were already in a brand new world. Here stood strange buildings, brilliant scenery, and unknown creatures. The air was filled with a mysterious and ancient aura, as if they had traveled through time and space to arrive in an ancient and mysterious civilization.

"Is this... the Sky City?" Guo Yao looked around, her eyes full of awe.

Li An nodded: "Correct, this is the place we seek. It seems our journey has only just begun."

The strange light of the mysterious sea, like a guiding lighthouse, led Li An and Guo Yao to a magnificent castle floating above the clouds—the Sky City. The castle's outline, bathed in the afterglow of the setting sun, appeared both mysterious and solemn; golden radiance intertwined with deep blue-purple clouds, forming a breathtaking picture.

Li An and Guo Yao stood side by side, gazing firmly at that Sky City which seemed within reach yet far beyond. Guo Yao's long hair fluttered gently in the breeze; she turned her head to look at Li An, her eyes flashing with trust and expectation: "Li An, we will definitely find the Ancient Key and uncover the secret of all this."