Zhang Tianran was also rather surprised by the murder of Barry's father.
Of course, he had not lied to Barry. He really had gone back to the past once, and he truly had not been able to see the killer who murdered Barry's father.
However, it was not as though he had no suspicions.
That abnormal speed, coupled with the inability to be seen, easily brought one person to mind—Savitar.
In other words, the future Barry in the form of a Time Remnant, a Flash who had completely fallen into darkness.
Before he had broken free from the Speed Force's control, he had also been able to appear through the Magic Stone. Yet aside from Barry, no one could see him.
But why would Savitar, who had completely fallen into darkness, kill his own father? To take Zoom's place and complete his unfinished mission?
Driven by that curiosity, Zhang Tianran decided to take Barry back to that night and hide in the shadows to observe what had happened.
Frequently entering and leaving the same point in time was extremely dangerous, even for a Speedster. It would make the timeline fragile, turning an originally ordinary moment into something far more significant.
Just like the night Barry's mother died. Because too many Speedsters had gone there, time in that place had become especially unusual.
Once a change occurred, it could affect not only the future, but possibly the past as well, just like a certain Flashpoint World.
However, as long as they were careful not to interfere with anything, they would not have any impact on the timeline.
Note that this meant anything. A footprint, a breath, even the air appearing there could not be changed.
Only then would the timeline remain unchanged.
Achieving that required specialized control over one's abilities. As