Apocalypse Guardians (2)

"So, I've told you everything you need to know. Do you have any more questions?" Shi Xiaoqing looked at Yang Zhang, waiting for another question as she expected it.

Yang Zhang nodded, "Yes. How about those people you called the Great four? Who are they?"

"Well, they are the four strongest humans who have gained the world disaster class ability from their mutated. I know nothing about them as their identities are kept secret, but they consist of three women and one man. All of their powers could literally wipe out a region, and they're only able to be tamed with the power of the Master."

"And who is the Master you're talking about?"