The Demonic Tribulation Light.
This was the Legendary Technique for slaughtering Lü Yang had cultivated in his current life. He used the Blood Sun Sword Pill as its vessel, while Yu Suzhen gathered and refined Celestial Fiend from Beyond the Heavens to create it.
Once the Ability was activated, the treasure serving as its vessel immediately shattered.
The Tribulation Light within would then burst forth, activating the Heavenly Stems. It would draw upon the Heavenly Stem Qi that permeated the space beyond the Thirty-six Layers of Gang Cloud, transforming it into a stream of fire.
As the Tribulation Light fell from the firmament, broke through the Thirty-six Layers of Gang Cloud, and drew near the ground, it would stir the Earthly Branch Qi from beneath the vast planetary crust.
This forced the Qi to surge upward, where it collided with the Heavenly Stem Qi falling from the sky. The two energies would ignite and explode, wiping out all life within a five-thousand-mile radius!
