Amid Zixiao's startled cry, the vast heavens and earth suddenly darkened, and the void was abruptly covered by thick black clouds that appeared from nowhere.
The black clouds appeared with such speed and suddenness that it was as if the immense void had suddenly split open, allowing the endless mist filling the Void Domain to surge out all at once.
The instant Zixiao's cry fell, the vast void spanning more than a dozen miles had already been covered by the dense black clouds that had surged into being.
The black clouds rapidly rolled and spread into the distance, and an oppressive aura suddenly descended over Heaven and Earth.
The black clouds churned, spreading and surging outward at astonishing speed. Their momentum was immense, and they struck fear into the soul.
Any mighty cultivator had faced a Tribulation Cloud before, and not just once. Whenever a Tribulation Cloud appeared, every cultivator would feel afraid. Even if it was not a Tribulation Cloud they had summoned themselves, their minds would still tense, and dread would rise within them.
The Tribulation Cloud itself was not frightening. What was frightening was the terrifying power of Heaven and Earth's punishment hidden within it, ready to manifest at any moment. It was supreme might that carried out Heaven's punishment in its stead, concealed within the Tribulation Cloud.
Regardless of who came into contact with the aura of the Tribulation Cloud, they would be subjected to the cleansing of Heavenly Tribulation Lightning.
As long as a cultivator existed between Heaven and Earth, even if he had not summoned the Heavenly Tribulation, the Heavenly Tribulation would still attack him.
That was because cultivation always produced an unusual aura that Heaven and Earth did not permit. Put plainly, that unusual aura was the cultivator's own magical power and energy.