As both sides struck at once, the onlookers could clearly sense the towering flames beginning to weaken.
They could see that the black azure thunder seemed to be the flames' natural nemesis.
After the two collided, the azure thunder's power was not canceled out.
Instead, it absorbed vast quantities of flame, making them part of its own energy!
Meanwhile, the Heavenly Master behind them swept both hands, and seventy-two triangular Commanding Banners flew from his sleeves.
Each banner bore incredibly intricate patterns and runes, giving it a mysterious, ancient appearance.
With the appearance of these seventy-two triangular Commanding Banners, the surrounding space began to quake violently.
With their support, the black azure thunder devouring the flames transformed into one terrifying lightning dragon after another.
Each of these lightning dragons was several thousand meters long.
Then they opened their mouths, converting all the remaining flames into even more lightning.
Seeing this, the people sheltered within Vulcan's protection looked utterly grave.
They could clearly feel the immense power Vulcan had unleashed rapidly weakening.
The nightmare power that had once seemed so distant now felt close enough to touch.
Even great numbers of Nightmare cultists used the approaching black azure thunder to surge straight through the flames toward them.
Zhao Hailong, Huang Tianhan, their fellow soldiers, and the many rescued Swordsmiths of Open-Heaven Manor all drew their weapons and began fighting the Nightmare cultists furiously.
Yet the warriors discovered that these Nightmare cultists were charging toward them not to fight, but to corrupt them completely.
Killing these mindless cultists was as easy as cutting grass.
But as the cultists died, vast quantities of nightmare aura began spreading through their surroundings.
Not only were the weapons of the several hundred Cast-Iron Guards at the front corroded outright, but their bodies were also infected to