Guardian's Oath

"Time and space echo": There is a basic structure called "time series fiber" in the universe, which records the information and energy of all timelines. When a major time node is disturbed or there is a huge energy anomaly, there will be an "echo" that can be sensed and even used by specific groups of people. "Guardian": An ancient and secretive organization with members scattered throughout time and space, responsible for monitoring and repairing abnormal time and space fluctuations to prevent the timeline from collapsing or being maliciously tampered with. They possess varying degrees of ability to sense or influence "reverberations." "Eroder": a mysterious hostile force that intends to break the order of time and space and use the power of echo to achieve some unknown ultimate goal.