Earth Continent, a mist-wreathed valley hidden beneath a great formation. Nothing inside could be seen.
Yellow Emperor, Black Emperor, Red Emperor, White Emperor, and Green Emperor refined the Black Banner.
Boom!
Suddenly, a stream of Black Qi surged from White Emperor's Black Banner.
The Black Qi soared into the sky, seemingly untouched by the great formation as it burst out through it.
The Black Qi shot into midair and suddenly transformed into an extremely evil demon's face.
"Ah gah gah gah gah gah~~~~~~~~~~~~~~~!"
The demon face formed from Black Qi abruptly let out a sinister laugh. The laughter shattered stone and split metal, suddenly rolling toward the four directions.
Every animal in the surrounding area that heard the laughter suddenly rolled its eyes back and dropped dead. Countless living beings had been laughed to death by the sound alone.
"Hmm!" Yellow Emperor raised his brows.
Red Emperor, Green Emperor, and Black Emperor also noticed that something was wrong. They immediately turned to look at White Emperor.
White Emperor's face was pitch-black, surrounded by countless wisps of Black Qi, as though he had fallen under demonic influence.
"White Emperor, wake up, you fool!" Yellow Emperor shouted.
"Buzz!"
The demonic face in the sky suddenly dispersed, transforming into a mass of Black Qi before vanishing completely.
The gloomy aura around White Emperor also abruptly dissipated!
"Whoosh!" White Emperor suddenly came to his senses.
"What happened just now?" White Emperor asked, still shaken.
"You were invaded by the external demon in the banner!" Black Emperor said with a frown.
"An external demon?" White Emperor looked at the Black Banner in his hand with a complicated expression.
"There was a flaw in your heart, and the external demon took advantage of it. We'll help you refine it!" Yellow Emperor said in a deep voice.