The demon ancestor Nether River Old Ancestor referred to having encountered before was likely Nether Bone Demon Ancestor, a subordinate of Darkness Demon Ancestor.
Nether Bone Demon Ancestor was a demon ancestor of the Evil Tide Civilization who had newly advanced to level-8 peak ten thousand years ago.
Naturally, his strength fell a notch short of veteran demon ancestors like Demon Ancestor Kaihuang.
Even among demon ancestors, there were differences in strength.
Nether River Old Ancestor had previously fought Nether Bone Demon Ancestor several times alongside other Saints of the Immortal Domain.
The strength of a level-8 peak dominator had left a deep impression on Nether River Old Ancestor.
However, perhaps because Master Tongtian and the others had been there to support him, and because he possessed the Twelfth Grade Karma Fire Red Lotus, Nether River Old Ancestor had not been particularly afraid of surprise attacks from Nether Bone Demon Ancestor's Civilization Supreme Treasure, the Heart Piercing Bone Nail.
Thus, after that war ended, Nether Bone Demon Ancestor had not left Nether River Old Ancestor with any lasting impression of an opponent he could scarcely contend with.
In fact, the battle-hungry Nether River Old Ancestor had constantly wanted another head-on clash with a peak powerhouse of that caliber.
But Demon Ancestor Kaihuang, who now stood before him, was different!
The moment Demon Ancestor Kaihuang appeared before Nether River Old Ancestor, his aura and presence exerted tremendous pressure on him.
And unlike Nether Bone Demon Ancestor, who might have been better at underhanded tricks, Demon Ancestor Kaihuang was precisely the sort to clash with an opponent head-on!
He was the ideal opponent for Nether River Old Ancestor's pursuit of a higher realm and greater power.
It was just that... this opponent seemed a little too strong.
If Demon Ancestor Kaihuang had