A large amount of negative energy was absorbed by the black cocoon, and there were even invisible flames rising and burning on the black cocoon.
As time passed, the aura of the black cocoon grew more and more powerful. In fact, it had already surpassed the level of a true immortal and was on the verge of becoming a pure yang true immortal.
Breaking through to the heaven immortal realm was a matter of course. The only problem was time, and such a speed was already shocking.
Not to mention the dark clouds gathering above the black cocoon's head, and the power of tribulations that could be seen with the naked eye. This indicated that the black cocoon was not simple.
"The first connate demon in the universe is about to be born," Chen jingzhai said."Once she breaks out of her cocoon, she'll become the black butterfly Demon King with the strength of a golden immortal."
"Golden immortal?" Star sovereign Hong Luan cried out in shock.