I'm terribly bored. The world is not enough. I have tried saving everyone and killing everyone, and it's not enough. There are still more books to read but they are kind of the same anyway. I mean, there's no need to read yet another book on algebraic geometry when you have already learned it three times, and even novels start feeling the same after having read maybe a few thousand ones.
I'm afraid of falling into a fixed point, an infinite loop where I repeat the same actions, the same thoughts, like a record on repeat.
Maybe bringing some others along with me will be the key to breaking the monotony. What if I cast the spell on somepony else? Would they come along with me?
Twilight's thoughts drifted to Lyra. She has always been so energetic and adventurous, with a big heart... if anypony would be happy with joining the adventure of time loop, it would be her. She has always wanted to break free from the normal, “boring” world that we live in... I should at least give her a chance.
Twilight thus became Lyra's friend, which was easy, as she was extroverted and excitable.
Several months into their friendship, Twilight finally decided it was the right time to talk to Lyra about her plan. “Lyra? We need to talk.”
“Gasp! I know it!” Lyra pressed against Twilight's chest, “You stole the cheese from the fridge didn't you?”
“Yes, but that's not what I'm getting at.” Twilight rolled her eyes and gave Lyra a new piece of cheese, “Here you go. Now could you sit down a while? I need to say something important!”
Lyra tossed the cheese in the fridge before sitting down. “Well?”
“Have you ever wondered how I came to know so many things?”
“Because you are really smart and hard-working?”
“That's necessary, but not enough. Nopony could ever learn ten languages, play three instruments, know practically the entire spectrum of mathematics, physics, and magic, know the entire history of Equestria, and many other skills I don't ever care to recall, all in thirty years!” Twilight grinned a little in conceit. Listing her achievements was one of the few things that consistently brought her joy.
“Wow... I didn't know you know ten languages.” Lyra looked on with wide eyes.
“Do you know how I came to know so much?”
“Because... Princess Celestia broke open your skull and poured all the knowledge into your brain?” Lyra poked at Twilight's forehead.
“... No. Nice imagery though.” Twilight stood up for dramatic effect, “I'm an immortal time-traveler.”
“What.”
“The details will come later, but for now, here's the summary... Remember the changeling invasion of Canterlot?”
“Yes, what is it?”
“Hours before the invasion, I was in the library studying a book. I tried a spell in it, and it gave me the ability to live in a time loop. Basically, if I die, then the next thing I know, I was back to the moment after I cast the spell, in the library. I would retain all my memories, but everyone else wouldn't.”
The night continued on as Twilight told Lyra of curious stories of her travels through the time loops, but making sure only telling the presentable bits. The gory details must wait until later, if they would be spoken about at all.
Oooooo! This is either going to work, or everything will fail horribly.
I've actually considered that idea myself; bring someone else along.
But every time I think it through, I get to the question "If person 'A' dies, would person 'B' come back with them?"
I usually come up with it being a case of "Now there's TWO people trapped in their own individual time loops".
Twilight would continue to respawn in the library, with Lyra being as oblivious to the time loop as everybody else.
When Lyra dies, she'll respawn back at the moment that the spell was used on her.
I can imagine Twilights reaction when she casts the spell on Lyra for the first time, and suddenly Lyra displays an "older Soul" than Twilight.
That would be her reset point after all. From her perspective, Twilight has lived for about 200 years. Lyra would eventually surpass that within her loop, but still coming back to a two century old Twilight.