Assasins
"Mommy?"
Dazzler was lost in the library. The already large tree had grown even larger over the years, ever since twilight sparkle gave it to Trixie, dazzler's mother and twilight's close friend. The library was a building made out of a living tree that had been hollowed out with magic. The library was full of books. Another thing about the library was that it was on fire.
"Mommy!"
Flame covered the walls of the hallway Dazzler was standing in. Smoke filled the room, stinging her eyes. She coughed, then called out again, screaming. "Mommy!" Her voice was starting to crack.
"Dazzler!" Exclaimed a voice from behind. Dazzler turned around and saw her mother, Trixie Lunamoon.
"Mom, we gotta get out of here!" Dazzler shouted. Her voice cracked once more. She coughed.
Trixie knew that her little girl had searched the entire burning library just for her, but Trixie had to do something here and now. She was the most skilled unicorn in ponyville after twilight left, meaning it was up to her to put out the flame.
"Honey, please go. Leave me here. Mommy will be with you soon ok?"
"Mommy, I-"
"Hush, Dazzler. Everything will be fine. Now run!"
"I can't, mommy! I have to stay with you!"
"Run!"
Suddenly, in mid sentence, the ceiling above trixie collapsed. The wood fell. To trixie, everything happened in slow motion. Everything trixie was told her to do one thing. Every neuron in her brain screamed at her with a single command. This first command was not to stop the ceiling with a basic spell. It was not to move out of the way. The first thing her brain told her to do was scream. She screamed two words, at the top of her lungs.
"DAZZLER, RUN!"
Dazzler turned and started running as fast as her legs could carry her. Suddenly she heard a loud noise from behind her and looked back. Time seemed to slow down. A chunk of the ceiling had been burned to the point where it had come loose. It had collapsed, and was falling. Falling down, directly towards-
"MOMMY!"
Now, how was the library on fire, anyways?
I'm glad you probably didn't ask. You see, earlier that day, dazzler had seen trixie perform a spell that attracted attention to the library. She heard her mother call it a "firework."
Dazzler decided to try and figure out how the spell worked on her own. She did a lot of studying and research, and in the end, she had a spell. She rushed off to show it to her mother.
Now, the difference between the spell trixie used and the spell dazzler used was that trixie's spell only created light, but not heat.
The spell shot upwards from dazzler's horn, while she was still inside the library.
The ceiling fell on trixie, ending her life. Dazzler screamed but didn't stop running. And in that moment, the moment of trixie's death, dazzler saw something out of the corner of her eye: a flash, coming from the side of her flank.
And that is how dazzler earned her cutie mark.