Twilight Sparkle, for the most part, was a very intelligent unicorn. She graduated top of her class, and was considered a budding genius while she studied in Canterlot. She was always the center of praise, and soared above her peers when it came to education. However, that all got very boring, very fast. It wasn't that she didn't love being Princess Celestia's personal protege(she was quite proud of it, actually), but it all started to seem so... Mundane. So naturally, although aprehensive, Twilight was excited when she heard she'd be moving to Ponyville. A change of scenery would be nice, albeit such a small town like Ponyville(who came up with that name, anyway?) would likely get boring fairly quickly.
However, her assumption was proved wrong, after she and her five new friends defeated Nightmare Moon and saved Princess Luna. The small town always seemed to have some sort of problem that needed to be solved, be it an Ursa Major running rampant, or a hoard of Parasprites devouring everything. And Twilight loved solving problems. She though too much, almost to a fault, and always needed to occupy her mind with something, lest she go insane. She Ponyville turned out to be a pretty great place to settle. Things never quite stayed the same, and Twilight reveled in knowing that.
But one day, things changed drastically. It started out normal enough, as Twilight spent most of the day reorganizing the library while Spike was at Rarity's. She had just gotten to the books under the fantasy category, when she found a book which she had never seen before. It was bound in black leather, with the title "Death Note" etched on in white ink. Her curiosity peaked, she levitated it before her using magic, and briefly skimmed through the pages, only to find all but the first few blank. Flipping back to the beginning, she read the first written page.
-The pony who's name is written in this note shall die.
What? Huh, typical. It's probably just Rainbow Dash or one of the Cutie Mark Crusader's pranks. The purple unicorn thought to herself with a roll of her eyes. But something compelled her to keep reading.
-This note will not take effect unless the writer has the pony's face in mind when writing his/her name. Therefore, ponies sharing the same name will not be effected.
Smart. What an elaborate prank. Whoever did it must have really thought it through.
-If the cause of death is written within forty seconds, it will happen.
-If the cause is not specified, the pony will simply die of a heart attack. After reading this, Twilight flipped to an empty page with a grin.
"Alright, Rainbow Dash, or whoever sent this, I'm going to write somepony's name. I wonder what will happen?" The mare muttered to herself sarcastically, and with a chuckle, pulled out a quill and bottle of ink. She then scribbled down a name. "Forty seconds, huh? Gee, I can't wait for nothing to happen." Twilight said with a smirk. After she realized she wouldn't even hear of the death right away on the very off chance that it occurred, she shut the book and trotted off to continue organizing.
~~~
Twilight rose early the next morning to find Spike still curled up in his bed. She quietly slunk downstairs, careful not to wake the sleeping dragon, and picked up the newspaper from outside her front door. What she read nearly gave her a heart attack. Frothy Mane, Equestria renowned criminal and murderer, had suddenly died of a heart attack the day before, exactly forty seconds after Twilight wrote his name in the Death Note.
This is impossible... I don't know of any kind of magic that could have caused it. Then again, this can't be a coincidence. Sweet Celestia... I just murdered somepony! Twilight's heart beat accelerated, and her mind began to whirl. No Twilight... He was a murderer. He deserved to die. Wait, what? No! Did I really just think that? Gah, I need to destroy this book! The unicorn finally made up her mind, and magically levitated it from the spot which she had left it. Firing up her horn, she prepared a spell that would disintegrate the book before anyone could ever suspect that pony's heart attack wasn't natural. Yes, she would destroy the evidence before anyone could ever find it. But think of the good I could do with it... The thought almost didn't seem to be her own, but it sparked a controversy within her head. What good could come of a book that only caused death? I- Oh. Oooh. Wait, no. That would be wrong. But... would it really? I would be doing a service to Equestria, after all. But killing is wrong! Only by society's standards. Let's face it, ponies only force themselves to believe it is wrong because they believe it will make them look better in society's eye when really, they would rather have all of the criminals dead than not. Think of it, the crime rate would go down tremendously, and murder would be so rare... I'd practically be a god. No! These thoughts... They're not my own. Something's wrong! That...book! It's all so very wrong. But why does it seem so right?
"Because, my dear, it is right." Twilight almost had a heart attack for the second time in the past twenty four hours.
"Discord! How did you escape? The elements should have kept you trapped for another thousand years!" Twilight spat at the draconequus whom had taken form in front of her.
"Oh, please, do calm down. It'd be a shame to wake your little dragon friend with your inane ramblings." Discord replied flippantly.
"W-what are you talking about?" The mare hissed, slowly backing away.
"I suppose I should explain that I'm not actually here. You are merely seeing a projection of my conscious. My body is still trapped in stone. Your little Death Note brought me here." He explained, plucking the book out of her telekinetic grasp and flipping through the pages. "Only on name? Hm, usually there're more than this by now."
"I don't understand, why did the Death Note bring you here? Is it yours? If it is, please, take it back! It...It's messing with my head." Twilight said that last part solemnly.
"Oh no dear, it became yours the moment you picked it up. I'm here because whoever possesses the Death Note is to be haunted by a draconequus, and since I'm the last of my kind, I'm the only one who can do it. For that reason, you are the only one who can see or hear me. So if I were you, I'd be a little more cautious. Wouldn't want them to deem you insane, would we? Now, I should mention that you can simply give it to somepony else should it become to big of a burden, but I'll have to erase all of your memories of the note if you do." Discord told her, tossing the note back in her general direction, which she caught with ease using her magic.
"No... In the wrong hooves, it could be even more dangerous. I- I'll just hold onto it for now. Maybe I could make it useful." Twilight said, her eyes seeming to flicker red for a moment.
"And how do you intend to do that?" Discord inquired with a smirk. Twilight paused, carefully choosing her words before finally saying,
"By eradicating all crime and murder, thus creating a new, better Equestria, where I will reign as a God!"