The Weasley in Slytherin

A new 'friend'

As the boog sek fell in the water, Astoria shrieked, Y/n acted swiftly, his movements instinctual and quick to save her book,

Accio!

Reparo!

The book's pages which were completely wet were now dry and the book looked cleaner than before, the fact that the book which was almost desecrated completely could be restored like this, it would require an exceptional mastery over the repairing charm. Astoria gasped as she immediately knew, Y/n was a prodigy, she had lost all hope, but Y/n's repairing charm saved the day. 

Her eyes leaked tears of happiness, she ran to him and hugged him, Y/n smiled a little, Ginny who was passing by, watched the scene from afar and scowled, it was no secret, Ginny's rival was Astoria, in every aspect, they were neck and neck, but Astoria would always edge over her. Seeing Astoria hug her brother, and seeing her brother smile, she felt jealous. She thought she was the only one capable of making him smile. She frowned and began stomping away, she had to write in her diary...

Y/n was finally begin to accept that Astoria was his friend. Y/n was also surprised that he was being hugged by his new friend, it weirded him out but he didn't comment. She released him and spoke in wander,
"How is that even possible, the level of control one would need to seperate every molecule of water from the paper and then restoring the paper to it's original state. You're brilliant!"
She went on and on, praising him, until he has to shut her up,
"Okay, that's enough, please stop, it wasn't that incredible. Anyways, what would you think, can Obscurials and by extent the Obscurials inside them be controlled, to harvest energy for and increased output of dark magic."
The question made her praises stop, she had a disgusted look on her face,
"Even if it was possible, that's inhumane and abusive, and why would you need a source of dark magic anyways."
Y/n noticed her glare and knew, he would have to play it off,
"I'm just curious."
Astoria doubted him but, gave him the benefit of the doubt. They continued reading and honestly, Y/n had a great time.

Ofcourse, Y/n's hunger for power seemed weird, why would he need all that power, what was he even preparing for. This hunger for power made him sneak past, the ghosts, the prefects and the librarian, to the restricted section of the library. He wasted away for hours and though it seemed imposed, in the restricted section he found a book...

The book was titled laws of magical energy, Y/n had already read a version of this book, but that edition didn't mention dark magic. This one however, it did, Y/n knew that understanding the laws of Dark Magical energy will be crucial to whether his theory is even possible. He read through and found one particularly interesting section,

~While it is true, that dark magic can be extracted and transformed for different uses, even light magic can be transformed into a dark relic, for example a horcrux, it uses light magic in the soul and tears it apart to create a dark relic, that can keep a part of you alive. However Horcruxes come at the great cost one's humanity. However those who have tried to extract dark magic from another and use said dark magic, they have all failed and died miserable deaths. But if one was successful, theoretically, he or she shall be able to perform dark magic at the scale of the source's power with free will, and no side effects, or consequences.

Y/n was intrigued by the possibilities. But he swiftly put the book away and strolled to the Slytherin dorms, and got to sleep for about 2 hours before he woke up. Early in the morning, Severus Snape had come to take him. Y/n followed him and they were in his office, practicing the dark arts. Snape's voice bellowed,
"Today you'll learn about the babbling curse."
Y/n scowled, Snape was holding him back, that curse was more of a prank than anything. He silently and frowningly practiced the curse made for children. After the boring, dull and thoroughly unchallenging lesson, Y/n stormed out of Snape's classroom to the top of the astronomy tower, to blow off some steam.
Y/n was very bored and decided that Snape was holding him back, so he would need to find a place where he could practice, without Snape's limitations on his progress. However the only way to find such a place would be exploring the school, so that's what he did, he roamed all around the school. He went around in circles so much. That by luck, he walked past a certain 7th floor corridor 3 times. Each time he thought of a place to practice magic and by the third time, when the door opened, revealing an arena with dummies and a library filled with books, with knowledge about the dark arts. Y/n was surprised, he would need to find out more about this later.

Y/n spent the entire day in the room of requirements, practicing the confundus jinx, the blasting curse and Antonin Dolhov's curse. A spell without a casting word, so all you needed to do is the proper wand movements with the right intent. Antonin Dolhov's curse, was a lethal curse, it slashed at the opponents from long range with purple energy, coated with black energy, making it even more ominous. It was basically a sectumsempra, but without the need to say anything, and it was larger and could only slash once at a time, however that one slash in the right hands, could cut through the hull of modern ships.

Y/n tried to limit himself, to as small as possible while practicing the curse, he wouldn't want to kill himself by doing something wrong. After an exhausting day, of practing the curse he left the room of requirements, and started to head to the library, to find out about this room.

However something, no someone was pulling him back when he was at the entrance of the library. Y/n flipped around to find a furious Astoria, she sneered
"Hey where were you the entire day? You do know you're my only real friend, right? Everyone else is just there because of my family's position and fellow pure-bloos bullshi-"
She paused but smiled a little when, Y/n apologized to her,
"I'm sorry Miss Astoria, it'll never happen again, but I was really bored today so I just skipped classes."
Astoria forgave him and then walked away satisfied, Ginny was boiling with rage at the sight of her brother apologizing. How come he could apologize to the Slytherin whore, but not Hermione or any of her own family!
What will Ginny do?