I don't own the Potter-verse just this story and some of the characters.

Prologue

Owlroot Manor stood on a lonely rain soaked hill in the North of England. The grounds were extensive and well kept, but dark and foreboding. A vast forest straight out of a nightmare covered the south lawn, the tree limbs seemingly beckoning to trespassers. It was in this environment that generations of Owlroot children had spent their summers away from school. On clear days the skies were filled with the shouts and shrieks of Quidditch battles fought long into the evenings. On the all to often rainy days the children would gather in the green house to learn about all manner of wicked plants from their Grandmother. Granny was a witch of countless age, who spent all her time in her beloved gardens. These were not the gardens of your mothers; these were gardens full of poisonous plants and deadly herbs. All to be used in whatever devious fashion she saw fit. For you see the Owlroots weren't the normal magical family. They were the spawn of devout Dark Wizards, a pure blood family to the very core. The latest generation was to be no change from their ancestors. Brothers born just two years apart, David and Michael were inseparable. As children they explored every inch of the forest and grounds. When they received their first brooms they incessantly challenged each other to races and daredevil expeditions that made their mother swoon. When David went to Hogwarts for his first year Michael was crushed. He had never spent more than a day away from his sibling Idol and was now faced with a year by himself. He took to spending long periods of time in his Father's library studying magic and charms, dreaming of the day he would join his brother in school.

Through the next few years David taught Michael everything he learned
in school and Michael rose to the top of his class. The boy's parents
were extremely proud of their Slytherin sons. They would often be
called into the hall to entertain their parent's guests with new bits
of magic they had learned. But one day the boys were not asked to the
hall. In fact they were locked out and told to stay away. Naturally
the boys listened at the bottom of the door but could only make out
snippets of whispered conversation, something about the Ministry.
David surmised that the Ministry had over stepped its bounds once
again and their Parents were planning on telling them off. The boys
heard the scraping of chairs and rushed from the door. Their parent's
visitor shrouded in a black robe exited the room and smiled at the
boys, but it was a smile that could freeze the blood in your veins.
The boys soon learned the name of this visitor and what he had wanted
with their parents. He called himself "Lord Voldemort" and was seeking
support from the pureblood families against the insurgence of half
bloods in the magical world. This was not the last visit the man would
make to their home and Michael grew to idolize him. He was a man of
vast power, younger than most of his followers he still commanded
their utmost respect. Michael would give anything to follow his
parent's master. David on the other hand could only pretend to admire
him and hope the Ministry would soon defeat him.