Banshee Draco
In this story Draco is born not a complete pureblood. In a long line of purebloods, it is forgotten that the Malfoys once had banshee in their blood line. Though Lucius is aware of this, he believes that the trait is quite diluted that it would never show up in his son or in any generations.
Years later Draco is five years old, it is the middle of the night when suddenly he decides to wander the manor. As he is wondering the manor he sees his father in his study, but he is not alone. Lucius Malfoy had been torturing a muggleborn for two days, growing bored he throws a killing curse at the wizard, who dies immediately. Draco witnessing the whole thing runs from the horror without his father realizing he was there. Draco heads outside towards the forest, he feels the need to throw up, along with a painful feel in his throat. He opens his mouth and a piercing scream tears through his throat, vibrating in the air. Animals on the grounds fleeing from the noise. He then passes out.
The next morning he finds himself soaked from the forest floor and heads towards inside the manor. A note is left for Draco telling him that his parents will be away for three days.
He never tells his parents of what happens and as he grows older he realizes what exactly he is; Banshee, a creature who senses impeding deaths. Draco learns to hide what he is from everybody.
As he heads to hogwarts, he feels he will not be able to keep his secret hidden forever.
(+5 if Draco stays away from Harry potter because he senses the death that surrounds him.)
(+5 If he develops a friendship with threstrals at a young age.)