A moment later, Lan Yuan opened his eyes, a hint of solemnity and determination flashing in his deep blue eyes.

His voice was kept extremely low, carried through the water to the ears of those in the shallow sea and those in the deep current, to avoid making a sound and revealing his whereabouts: “We’ve arrived.”

A very slight temperature gradient appeared in the water not far ahead, half a degree higher than the surrounding seawater. This is a unique temperature difference between artificially created spaces and natural waters, indicating that there is an artificially excavated channel nearby.

The entrance to the crevice was just beneath that black reef in front of us. That reef had a smooth surface, was completely free of seaweed and barnacles, and was distinctly different from the surrounding reefs, making it easily identifiable.

Shallow Sea and Deep Current nodded simultaneously, a hint of excitement flashing in their eyes, but they remained calm and did not make a sound.

The three adjusted their breathing, suppressing their aura to the extreme, and continued to move forward silently.

After navigating around several massive rocks and avoiding several swift undercurrents, we finally spotted a completely black rock.