"So it really was the timeline being modified. What a troublesome ability." The Immortal of Years frowned. An ability like that was almost impossible to guard against.
"And it's only one of his abilities," Lu Yang said. "The Immortal Fairy's disappearance shouldn't have anything to do with the timeline being modified."
"What makes you say that? When the Undying Immortal fell, the world forgot her, but the four of us still remembered her. If the timeline had been modified, shouldn't the four of us have forgotten her too?"
"That's not the only reason. From what we've seen so far, the mastermind can't modify the timeline however he pleases."
"In the hundred thousand years between the Immortal Fairy's disappearance and the fall of the Blazing Fire Dynasty, he didn't change the timeline so that the 'Four Ancient Immortals' never existed. That means there are limits to modifying the timeline. We don't know what those limits are yet. Maybe powerful beings can't be erased directly, or maybe events too far apart in time can't be changed."
If even the Four Ancient Immortals couldn't be erased, how could the Immortal Fairy be?
"How did you conclude that events too far apart in time can't be changed?" the Immortal Fairy asked, a little confused.
"Here's a simple example. If the mastermind wanted to erase Immortal Ying Tian by modifying the timeline, what would be the easiest way?"
"Senior Ying Tian was once buried as a grave good, then escaped. The easiest way would be to change the timeline so he never escaped and died in the tomb."
"But the mastermind didn't do that."
"That's why I said the mastermind might not be able to change events too far apart in time."
"As for how the mastermind can modify the timeline, I suspect it's the