Through the experience of another Supreme Heavenly Demon, Lu Yongnian, he had found no record of a great battle involving a Supreme Heavenly Demon.
He had died from Qi Deviation.
But Lu Yongnian was not a Supreme Heavenly Demon from thirty thousand years ago.
Thinking of this, he shook his head and lowered his gaze back to the Black Box.
This Black Box was quite profound, especially its patterns, which faintly bore the shadow of divine script.
Yet they were not divine script.
They were most likely a kind of pattern derived from divine script.
He formed a seal with both hands.
At once, a sheet of clear light appeared in the void and dropped abruptly, covering the Black Box like an overturned bowl.
A flash of light flickered within the Black Box as it tried to burst out, only to strike the cover of clear light and recoil as though shocked by lightning, drilling back inside.
Chu Zhiyuan smiled and continued urging the Great Demon Subduing Seal to refine it.
The clear light grew denser and brighter.
The Black Box seemed to slowly sink into a crystal-clear lake.
The lake shimmered beneath the sunlight, while the Black Box sank ever deeper.
It sank into the depths until it was almost impossible to see.
Half an hour later, the clear light slowly faded.
Even as Chu Zhiyuan continued to drive the Great Demon Subduing Seal, he could no longer condense more clear light. Instead, it continuously dispersed.
When the clear light had completely vanished, the Black Box returned to stillness.
He flicked his sleeve.
The Black Box immediately opened, revealing a palm lying within, translucent as jade.
Above the palm floated a clump of seven-colored light, swaying and drifting unsteadily.
The palm-sized seven-colored radiance leisurely shot toward him at last,