Dragon Vein Crystal Marrow.
Only formed after the most supreme bloodlines of the Dragon Clan had completely fallen.
Its value was simply impossible to measure.
If Dragon Vein Crystal Marrow was used as a catalyst, the stability of one's Dao foundation would far surpass that of cultivators at the same level.
Even for cultivators in the Void Refinement Phase, Body Integration Realm, or even the Mahayana Realm, it was an unrivaled body-tempering treasure they could only dream of obtaining.
Xu Changqing took out a jade bottle and carefully filled it.
As the golden liquid flowed past the mouth of the bottle, an indescribable aura spread through the water, carrying the warmth of dragon blood and the crisp chill of dragon bones.
The Ancient Dragon Remnant Soul coiled nearby let out an extremely low, lingering dragon chant.
It carried a trace of resentment, a trace of sorrow, and a trace of unwillingness.
Once the jade bottle was full, Xu Changqing was about to leave when something at the bottom of the hollow suddenly caught his attention.
At the very center of the hollow's bottom was an embedded pearl.
The pearl was not large, only about the size of a thumb.
It was pitch-black, identical to the Creation Guixu Seal in his hand.
Yet unlike the Creation Guixu Seal, this pearl was not dead. It was alive.
It flickered rhythmically, black as ink when bright and nearly transparent when dim.
With every flicker, a warped shadow of light flashed within the pearl, too fleeting to catch.
Zhao Ziyue leaned over for a look and froze. "Old Xu, do you know what this is?"
Xu Changqing asked, "What?"
"A Dragon Pearl."
Zhao Ziyue swallowed. "And not an ordinary Dragon Pearl, either. It's the Dragon Pearl of that ancient dragon.
Its flesh had completely