Wherever the flaming ruler beam passed, it tore a pitch-black rift through space, and the heat released by its flames made everyone's expression shift.
Xiao Yan's heavenly flames had already reached an exceedingly terrifying level. Amplified by the Heavenly Flames Eternal Ruler, their power became even more horrifying.
At the sight of the enormous ruler beam, the Heavenly Underworld Old Demon's expression changed slightly, and his pupils contracted.
"Even if you used a secret art to force your way into the Half-Saint realm, you still couldn't possibly be a match for me!"
The Heavenly Underworld Old Demon roared. His two blood-red eyebrows, which hung down to his shoulders, abruptly swelled into blood-red dragons hundreds of yards long and surged toward the ruler beam.
But what sent a chill through his heart was that those blood-red eyebrows barely accomplished anything before the flaming ruler beam sliced them both in two.
"Damn it, how can this brat be so strong!"
The Heavenly Underworld Old Demon's expression finally changed. He stared fixedly at the enormous black ruler in Xiao Yan's hands. The strength Xiao Yan could unleash likely had something to do with that black ruler.
But he no longer had time to dwell on it.
The Heavenly Underworld Old Demon suddenly gave a low shout, and boundless blood energy began pouring from his entire body.
Rumble!
Space trembled behind the Heavenly Underworld Old Demon. A terrifying phantom sea of blood spread across the sky, seemingly filled with countless drifting, aggrieved souls.
"Just how many people has this bastard killed to cultivate to this level!"
The many experts watching the battle all looked shaken at the sight of the phantom blood sea.
The Heavenly Underworld Sect's demonic methods had far surpassed their imaginations.
"Heavenly Nether Asura Armor!"
The Heavenly Underworld Old Demon growled.