Xu Feng carefully examined the sun pattern on the stone wall and found that it had been carved deep, with sharp edges.
Clearly, it had been carved within the past few years as a marker.
An extremely faint trace of law energy lingered in the grooves, gentle and familiar, exactly like Tuhe's stellar law.
"It was them." Xu Feng turned to glance at Ah Kun, then looked down at the river below.
Ah Kun returned to human form and strode to the wall. He reached out to touch the sun pattern, his fingers trembling slightly. "These carvings... two years old at most. This should be the entrance."
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Without further hesitation, Xu Feng extended his spiritual power into the cave.
The entrance was spacious, but his spiritual power had traveled only a hundred meters inside before some force at the river bottom disrupted it.
Yet there was a hint of order within that disruption, as though some array formation was operating.
"There's an array inside," he said, withdrawing his spiritual power and glancing at Ah Kun. "Follow me. Don't fall too far behind."
With that, he plunged into the water.
Ah Kun immediately followed.
"Glug, glug—"
It was much darker underwater, with a little daylight visible only near the entrance.
The river surged out of the cave, its current swift.
Completely unaffected, Xu Feng swam slowly deeper inside.
As the light gradually faded, all Xu Feng could hear was the rushing water.
Above him was a slick stone ceiling covered in a thick layer of moss.
Below him, the riverbed gradually grew shallower.
The farther he swam, the darker it became.
After swimming roughly three hundred meters, Xu Feng broke the surface with a splash and looked around.
This was an underground limestone cave, somewhat smaller than