The gray longsword trembled continuously within the cauldron, trying to break free.
But after being refined by vast amounts of Crimson Sun True Fire without any Yin Energy to support it, its power grew weaker and weaker, unable to stir up any great waves.
Even if it was a treasure left behind by an Earth Immortal, its current grade was only high-grade Fifth-order, and its wielder's cultivation was insufficient.
Being able to contend with an ordinary Early Soul Transformation cultivator was already quite remarkable.
Moyu's strength ranked among the stronger ones of Early Soul Transformation cultivators.
With the Forging Immortal Cauldron, a former Seventh-order mid-grade artifact, suppressing it was naturally no difficult task.
Wang Daoyuan smiled. "Whatever reserves the Soul Demons still have, bring them out quickly.
"So far, you have shown me nothing worth my notice.
"If you have no other means, I am afraid you will not be able to keep the Soul Domain."
The previously imposing voice had now lost its arrogance. "Supreme Emperor, your abilities are extraordinary. Even the Soul-Slaying Formation left behind by our ancestor could do nothing to you.
"Our ancestor left behind quite a few things, though most of them cannot defeat the Supreme Emperor.
"We shall directly bring out our strongest method. If we still cannot win, the Soul Race is willing to submit to the Supreme Emperor's disposal."
After those words, the Yin wind and Yellow Spring water from earlier both stopped, and the ground began to shake violently.
After the earlier chaos, the gray mist in this place had mostly dispersed.
Whatever was causing the Yin Energy-filled ground to tremble was now clearly visible to Wang Daoyuan.
In the distance stood an enormous altar, beside which were statues of a man and a woman.
They were the same as the