C2620 The Mutation Was Not Clear.

Yang Ze asked, "What exactly is that black fog?"

"I am not too sure. I only know that it is related to the Rebirth War." Sunn Mengmeng continued, "When the Star Phoenix came back from the battlefield, it carried a wisp of mysterious and ominous power with it."

Due to the fact that it was very small and very secretive, even the almighty expert of Immortal Vast did not notice it.

"Actually