As mentioned in the description his is a Harry Potter/Kingdom Hearts crossover. This story disregards everything what happened after Kingdom hearts 2 which means the Organizations goal is as it seemed in Kh2 the creation of Kingdom Hearts to get a heart again.
On a clearing behind a small forest is a giant manor surrounded by a high wall with a giant gate made out of iron. In front of that gate were 2 people.
A man with dirty blond hair who has two bangs which frame his face and large green eyes and a large black cloak faced off a young boy with dark brown hair and blue eyes. He wore a white and black over jacket as well as a red jumpsuit and a pair of white with yellow gloves and wore overly large yellow shoes. In addition he had a necklace in form of a crown.
A man had a large blue shield and the boy weapon was a sword in form of a key. The fight lasted about an hour and in the end the man was defeated. He fell to his knees "You have such strength even at the mercy of your memory" "None of that matters just put Riku back" replied the boy fiercely.
The man laughed coldly "Just put him back" The man got up to his feet "The Riku you speak of has but one fate to sink into the darkness and you will share that fate Sora. If you continue to seek the girl Namine the shackles will tighten you will lose your heart and end up being Marluxia's pawn" "Marluxia?" asked the boy named Sora confused "What has Namine to do with"
Before he could finish his question a giant ball of fire flew pass him and hit the man in his chest who fell back on his back. The surprised boy looked behind him and saw another man wearing a black cloak. He had spiky red hair and green eyes. "Axel" Sora shouted to the man. "Yo Sora. Did I catch you at a bad time" Axel asked nonchanatly.
The man on the ground looked up and tried to got up again "Axel why" "I came to stop you from talking to much by eliminating your existence" "No don't do it" the man begged "We are just nobodies who have no one to be yet we still are but now you can be nothing instead of just being a nobody. You are off the hook" replied Axel without a care in the world "No please don't" begged the man clearly afraid "I don't want to" "Good bye" interrupted Axel killed the man with his fire.
The body of the man slowly dissolved in black mist. The boy looked horrified in the way the man died and asked "What in hell are you people?" The man just shrugged "Don't know. I wonder about that myself" before he vanished with the help of shadows.
In a different world
Within the highest mountain chain of that world was a decent-sized house hidden. In the cellar of that house were two giant rooms. One of the rooms was a laboratory the other was entirely empty with two exceptions. The first one was a giant computer the other were many empty orbs flying in the middle of the room. A man was currently working on the computer he was too absorbed in his work to see that black mist started to flood from every single angle into the room. The mist had but one direction one of the orbs which in the air. The orb soon absorbed the entire mist.
After hours of work the man finished his work and turned around he looked up to the orbs and was surprised. One of the orbs had turned pitch black with a white emblem of a shield. The man cackled mad "Very good. It seemed the Keyblade's chosen one has started to kill of the members of the Organization but unfortunately it was just Vexen the weakest of them all nevertheless if everything goes according to plan the Organization will be destroyed in a little more than a year and then the next phase can finally begin. I wonder who will be the next to die. Will it be Larxene or will be Riku faster than Sora and Lexaeus will be the next to die"
"One year just one year and I can start to work to my true aim and while doing that I will get my REVENGE"