As everyone knew, although the Quantum Realm could send someone back to a specific point in time, in reality, it merely brought them to a new Parallel Universe and created one. It did not change the "original world."
Simply put, what had already happened could not be changed.
So the plan to save Gwen could not simply send this Peter back to that point in time. If they did that, they would merely be stuffing a Peter Parker into some Parallel Universe. How were two Peter Parkers supposed to share one Gwen Stacy?
What Harry wanted to do was truly reverse "time."
The Time Stone could do this. During the conflict on the Sacred Timeline, Vision had willingly let Wanda kill him, only for Thanos to revive him with the Time Stone. That was an excellent reference.
But the problem was that Young Peter's universe had no Infinity Stones.
So Harry needed to reproduce the Time Stone's power through other means, and that all began with analyzing the Time Stone.
The Time Stone was one of the most powerful forces in the universe. After research by the Osborn Group, Harry had basically determined how it worked:
First, "time" itself was an abstract concept humanity had created to better describe the universe. What it truly represented was the motion of matter, the continuity and sequence of change.
The Time Stone was an artifact that recorded the state of matter at every moment from the universe's beginning to its end. With a single thought, it could reproduce the state of a certain object—or even the entire universe—at a particular moment.
This was somewhat like Laplace's Demon, the hypothetical demon scientists had once imagined knowing the exact momentum and position of every atom in the universe, capable of using Newton's laws to reveal