Thinking of the terror of that primordial desolate spirit, Chen Nianzhi's expression grew increasingly grave.
Such an existence was one of heaven and earth's most ferocious evils, far beyond comparison with ordinary demon immortals or divine spirits. Should they face it, the danger would be impossible to predict.
"This boundless black serpent's strength is likely enough to rival a half-step Earth Immortal."
Chen Nianzhi spoke, his expression incomparably solemn.
Six Luminaries Immortal's face changed slightly as well. He could not help but ask, "Such a fierce creature will be difficult to deal with. Should we retreat first and summon the Immortal Alliance's immortals to besiege it together?"
"No hurry. It won't be too late to test its methods first."
Chen Nianzhi shook his head and spoke.
With a sweep of his sleeve, he unleashed the Heavenly Separation Twin Swords. They transformed into two brilliant sword beams and cleaved toward the boundless black serpent.
Hiss!
Seeing the two immortal swords slash toward it, the black serpent let out a hiss. Its enormous black tail swept out, sending the Heavenly Separation Twin Swords flying.
Not only that, after knocking away the Heavenly Separation Twin Swords, the tail's remaining force surged onward, continuing toward Chen Nianzhi.
The two evaded beneath the pressure of the boundless heavy water. They saw the serpent's tail blast a vacuum bubble through the heavy water, making the Endless Abyss shake violently.
Six Luminaries Immortal seized the chance to drive an immortal sword down, only to find sparks bursting from the serpent's tail. It left behind merely a white mark.
"What a powerful body!"
Six Luminaries Immortal was inwardly shocked. He said with utmost gravity, "This black serpent is oppressed by Guixu heavy water. Every scale bears the pressure of hundreds of millions of jun, and after tens of