This world, this world stinks, it stinks and we're right in the middle of it. I can't get the smell out of my nose and the headmaster isn't doing enough to get rid of it. I have a way to do that, the good news is I don't even need your help for it."
"Then why are you planning on teaching us?" A young Gryffindor asked
"Another good question" Harry admitted "I don't have to teach you, in fact I don't even need to tell you all anything. But admittedly, I'd rather not have your deaths on my conscious when I could have helped. Plus Hogwarts is my family and I'd like for at least a part of it to know that I am doing what I do for a reason and know that I'm not the next dark lord, after Voldy is dead I plan to have a nice and quiet life. Maybe play quidditch or stay at home and let Ginny do that while I cook, the point is I'm asking you guys to trust me"
"Harry" Daphne spoke "why don't you want Dumbledore to know?"
"Because he'd disapprove, not the group itself but he'd disapprove what I'm going teach you"
"What are you going to teach us?" Astoria asked
"Well first of all I need to make sure you all know the basics like stunning and disarming and all that, then if you do, I will teach you some stuff with stronger results."
"Stronger results?" Neville raised an eyebrow
"I'm not teaching you dark arts" Harry clarified "a lot of you probably haven't read up on this but if you use dark arts then you can develop a dependency for using them. It means you can't last long without using them or you'd be in physical pain, it happens to a lot of death eaters, it damages their mental state. Take a sane person and give them dark art dependency then they could become as bad as half of those in Azkaban.
It would be alright if you did the proper research and learnt how to use the spells without damaging your own mental state but I'm not going to risk teaching you it out of the chance you could all become the next generations death eaters. I will however teach you different ways to utilise what you currently know or what I call grey magic."
"What do you mean?" Fred asked
"Okay" Harry replied "for example, during my duel with Voldemort I sent some bats at him, I then transformed their wings into spiky metal ones that ended up cutting him and gave me the same result as multiple cutting hexes. Even the simple spells, banish a knife at an opponent or throw them off a cliff with a levitating charm. I will be showing you all how to use everything you know more effectively and efficiently.
I will also be teaching you spells that aren't illegal but they are dangerous and some are even frowned upon, but personally I think that if you're getting attacked by a death eater then everyone else can keep their bloody opinions to themselves and you do what you need to do to survive."
After some more talking, Harry and everyone agreed, Harry made everyone agree and soon they all began taking lessons in the room of requirement and agreed on a name for the group. At first they wanted to be Potters Army but Harry politely declined, eventually they settled with defence association or 'DA'.
Over time they began to recruit more people, including Blaise Zabini and Theodore Nott from Slytherin, Theodore wanted to convince Harry that he was nothing like he's death eater father. He was very surprised when Harry promised he wouldn't judge him and he'd do his best to stop overs from doing so. Someone asked if they could invite Cho but Ginny immediately shot down that idea.
Each and every member of the group signed a magically binding contract saying they couldn't talk about the group to anyone without Harrys permission, so Harry wasn't worried about people telling on him. At least not from the group.
They regularly met in the room of requirement, Stink had sent everyone messages of when to meet up until Harry had developed a watch that could be used to message the other DA members with the time. The watches were a stroke of genius as only Harrys watch could send the messages and nobody could use Harrys watch except Harry.
The first few lessons started with everyone getting to know the basics, one person complained about learning the disarming curse and emphasised it was useless. At least he did until Harry used it on him and he went flying half way across the room.
Everyone began improving, learning the basic spells and the patronus spell as well, soon he even taught some more deadly spells and how to use their current spells to seriously harm or injure. Everybody who attended loved Harrys classes, they found him to be a combination of Flitwick and McGonagall, strict when necessary but fair and fun the rest of the time. Ginny helped him teach as well and she was pretty much the same, Harry was having fun as well.
He never knew he'd like teaching, he enjoyed teaching Ginny because she was Ginny but he never knew he'd like teaching a big group. Harry was planning on revealing his identity at some point, so he was glad that he'd have some support when he did. With that being said Harry did the best thing he could think of to obtain friendship and make everyone happy at the same time.
He conjured some dummies and made them look like Umbridge before he told everyone to let lose.
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