Incompetent People from the Dark Ages?

The dark age when order collapsed and the world fell into chaos was also the golden age when heroes with extraordinary power achieved legends. The man who can control the mind has become the great emperor in the history books, the man who can stop time has become the worshiped god, and the man who can only communicate with birds has mastered the secrets of everyone. And the boy who lost his memory... Only remembered that he was a person without any abilities.