It was cold, too cold for the end of spring and it was raining a lot too, his clothes were damp and freezing, it seems that even the weather knew that that day would not end well.
At the top of the astronomy tower it was possible to see three distinct figures, one of them was a pale and shivering student, he seemed to be with cold, the other was considered the worst professor of hogwarts, being known to be snippy with any student who is not from his house, Slytherin, and finally, the considered greatest wizard of all time after Merlin, the director of the school of witchcraft and wizardry Hogwarts, Albus Dumbledore. (You can read all of it with sarcasm)
The director was on the edge of the tower, maybe one more expelliarmus would knock him down. The pale boy, Malfoy, had his wand pointed at the man, and in the corner was the Potions master, who had already disarmed Dumbledore before Draco appeared.
Tired, that's what he was, The Malfoy boy had been pointing his wand and staring at the old goat for a long time, he needed action.
Then he came out of his hiding place, pointing an unknown wand at Severus Snape thus disarming him and catching his wand, without saying a word and at a surprising speed, with the wand in his dominant hand, the boy turned it towards Dumbledore, this one was shocked, he couldn't believe that he was the traitor all along, the old man expected that from everyone but not from him.
— My boy, what are you doing?
In that sickly grandfatherly tone, said the old man.
— Ending this once and for all Albus. Avada Kedavra.
The speech was barely heard, a very low whisper covered by the sound of rain and strong and insistent wind, he turned to Draco. — You failed your task, Malfoy Heir.— Again that bright green flash appeared and the boy laughed out loud, Snape didn't know how to react, not only Dumbledore was killed but also his godson Draco.
At the door of the tower a very handsome figure appeared, wielding a bone white wand and surrounded by former Azkaban prisoners. The man approached the boy, placing his hand on his back and whispered in a language totally incomprehensible to everyone — Very good My Horcrux.
The war ended there, the dark side victorious, and all because
The Boy Who Lived was the Traitor.