You slowly entered the Golden Oak Library, already feeling a little tired out from the race you had just had with Rainbow Dash.
It felt as if as soon as you made contact with your bed you would simply pass out right there and then.

Obviously, you couldn't do that, though. You had promised Twilight that you would help her research the cause behind your mysterious burst of speed.

You couldn't blame her for wanting to research such a thing. Even you didn't understand, and they were your wings.

In the end, there was always a possibly that it was simply one final effect of Zecora's spell, but something told you that wasn't the case.
The powder you used on your wings was blue, while the energy you emitted during that burst of speed was yellow.

"I'm guessing you're pretty tired out?" Twilight asked, already heading for a bookshelf which seemed to hold books about Pegasi anatomy and other scientific junk.

"I am, for sure!" Spike answered, leaping down onto the nearest couch.

"You didn't even do anything, Spike." Twilight replied, but Spike was too busy sinking further down into the couch to respond.

Now that Spike was busy lazing around, you could actually give an answer to her question.

"Yeah, a little bit." you said, rubbing your eyes tiredly. Oh, how much you craved the warm embrace of sleep, no matter how terrifying the dreams you may have are.

"Well, the quicker we do this, the quicker you can end up like Spike!" Twilight joked looking down at the baby dragon, who was already fast asleep.

Speaking of which, Twilight had found a book and was now holding in the air with her unicorn magic. It wasn't a book about Pegasi specifically, too your surprise.
Instead, it was simply a book about magic, and the different types of magic commonly used by ponies.

"What's that?" you asked, curiously, before taking a seat next to the sleeping baby dragon.

"A book about different forms of magic!" Twilight exclaimed, placing it down enthusiastically on the table, but still quietly enough as to not wake Spike.

"I thought only Unicorns could use magic?" you questioned. Quite honestly, you wouldn't be surprised if there were more types of magic users in this world.
After all, the show back on Earth was merely a small window into this world you know found yourself in.

"Technically, they are. But other ponies can have passive magic abilities." she announced, as if she was teaching a lesson at a school.

You looked at her, curiously, desperately wanting to know more about the magic used by other ponies.

"For example, I've always had a feeling that Pinkie's pinkie sense is magic!" she explained, much to your interest. You never really found out much about Pinkie Pie's sixth sense, even after watching the entire show multiple times over.

"Ok, well what do you think my passive ability is?" you asked.

Twilight looked down at the book, staring at a page that was out of view to you, then back up to you. It was impossible to tell if it was good news or bad news.

"All Pegasi usually have one common ability, which is the ability to move clouds," Twilight explained. This you already knew, as you could even do it yourself, "But have you ever tried to manipulate a rain cloud, Storm?"

You couldn't say that you had, or that you really had any reason to. That was mainly a weather pony thing, and that wasn't really your forte.

"No, why?" you asked, a little confused but still maintaining interest.

"Well, if you did try to form, or even move a rain cloud, you would fall straight through it." Twilight said, sadly. Now the question on your mind was: why?
And how did this relate to your wings?

Seeming to be able to read your mind, Twilight answered your questions.

"Because you were once a human, you're mass is still too different to that of a normal Pegasus and therefore you can't safely interact with water vapour at the density it currently resides at whilst in a rain cloud!" Twilight explained, tracing words from the page.

You were at a loss for words.

"How do you know all that?" you asked, seeming a little suspicious.

"Oh, I didn't! I read it from the book!" Twilight laughed, "But I don't know how all that got in the book. As far as I know, there's never been another human in Equestria before!"

That did seem pretty strange. Was there another human in Equestria before you? And if so, what happened to them?

"It's a plot device!" you heard a voice whisper, as if they were directly next to you. It almost sounded like it was Pinkie Pie, but there was no way she got into the library without anypony noticing.
You must've been hallucinating. After all, you were pretty tired.

"Anyway," Twilight said, returning back to the point, "Since you were once a human, that came with a magic trade off."

You had no idea what that meant.

"What does that mean?" you asked, seeming a little nervous. All of this talk about magic was still pretty new to you. After all, on Earth magic is merely a myth.

"It means that even though you can't manipulate rain clouds, you have a different magic ability." Twilight explained, much to your curiosity, "And it's not exactly a common one, either."

This made your curiosity spike. You simply sat there waiting for her to tell you what your trade-off magic ability is.

"That yellow energy is called... 'determination'," she told you. You could have sworn you had heard about this in a video game back on Earth, "And so far only one other pony has ever been known to be able to use this kind of magic!"

That made you feel pretty... weird. If not even the two princesses had this kinda magic, then that made you pretty unique. Honestly, if you had a magic ability that was this rare, you were surprised you hadn't even met the princesses yet.

"So who else had this kinda magic?" you asked, wondering whether you could go to them for advice.

"Well, um..." Twilight said, studying a page that was once again out of your sight, "We're not really sure..."

Well, that probably wasn't good.

"There were only ever sightings of a pony draped in shadow wondering around the outskirts of major places in Equestria, like Manehatten and Canterlot. It almost seemed like they were using their magic on the cities themselves," Twilight explained, "And they were always seen using yellow magic, just like yours."

You weren't sure whether this scared you, or comforted you. It was nice to know that there was another like you, but as far as you could tell, this other 'pony' could've been up to no good.

"What happened to them?" you asked, still maintaining the question as to whether you could ask them for help.

"Nopony knows. One day they just... vanished." Twilight said, still reading from the book.

"Well, if nopony ever got close to them, how do you know the yellow magic's name and stuff?" you asked, wanting to know as much as you could.

"Oh, we don't. That was just a name given to it, seeing as how the pony was so determined to continue stalking the cities for some unknown reason." Twilight explained, finally seeming to come to an end of the page she was reading.

Now another question had entered your head: how did anypony know what this 'determination' could do? After all, nopony had ever really seen it in action.

"How do you know what the magic can do, then?" you asked.

"That's why we're talking now, Storm! Seeing as how you seem to be the second pony to ever have determination magic, you can tell me anything weird that happens to you!" Twilight said, delighted by her idea.

That didn't sound like a bad idea. If you could find out more about determination, maybe you could find out about this mysterious pony, and maybe even what happened to them.

"Ok, yeah! We can try that!" you replied, much to Twilight's happiness.

"Great! That means I can further my research and help you out at the same time!" Twilight exclaimed, happily.

Suddenly, Spike awoke from his slumber, probably due to Twilight's enthusiastic yelps.

"Yeah, yeah, that's great and all, but some of us are trying to sleep!" Spike grunted, turning over to face the back of the couch.

Speaking of sleep, that was something you had wanted to do for a while.

"I should probably go get some sleep now, too." you said, already beginning to make your way over towards the stairs.

"Oh! Right! Sorry!" Twilight said, apologising for keeping you up so long. You quickly reminded her that you didn't mind staying up a bit longer, before reaching the stairs, "Goodnight, Storm!"

You replied with your own goodnight to both Twilight and Spike, before finally reaching your room.

Determination, huh? You had never really viewed yourself as that determined. Then again, it was only a name given to it by the ponies who saw that mysterious figure in action.
Chances are, the magic itself had absolutely nothing to do with determination at all.

You also found yourself wondering how to use this magic. You weren't a unicorn, and you certainly weren't an alicorn. You were simply a normal Pegasus, yet somehow you had the ability to use a form of magic that is relatively unknown to Equestria, even to the Princesses.

Last time, you triggered it without even knowing how. At some point, you would have to learn how to use this magic and keep it under control. While it initially seemed helpful, you had no idea how you were going to control the magic without a horn.
After all, there had never really been a non-horned magic user before.

Anyway, these were questions best left for another day.

Right now, sleep called. And you were definitely going to answer.

Author's Notes:

The next chapter may take a little while longer to make if it's as long as I want it to be. Usually when I say that it ends up being no longer than normal, but who knows, right?
If it does end up being normal length, expect a normal update time, but otherwise it may take a few more days.

P.S. Yes the game mentioned is Undertale. Expect a lot of references and jokes about that game.