The plot could be developed by showing Harry's initial doubts and struggles. Maybe he's offered power and knowledge by the dark side that he can't resist at first. For example, being promised the ability to bring back his dead parents. Then, as he gets deeper into the dark side, he starts to realize the true cost of his actions.
One way to develop the plot of 'Harry Sold to the Dark Side' fanfiction is to focus on the external factors that push Harry towards the dark side. It could be political unrest in the wizarding world, with the dark side presenting itself as a solution. Then, as Harry becomes part of the dark side, his identity starts to change. He might be given a new name or a new set of powers. The story could then build on how he tries to reconcile his old self with his new dark identity. There could be a moment of self - reflection where he realizes he's gone too far and tries to find a way back, or he could fully embrace the dark side and become a major antagonist, changing the entire dynamic of the wizarding world as we know it.
One interesting 'Harry Sold to the Dark Side' fanfiction could be one where Harry is tricked into joining the dark side. Maybe Voldemort manipulates his sense of loneliness after the death of Sirius. Another could involve a magical artifact that compels Harry to side with the dark forces against his will. And there might be a fanfic where the wizarding world turns against Harry, pushing him towards the dark side out of desperation.
The plot could involve a new dark wizard who arrives at Hogwarts under the guise of a dance instructor. He teaches a dance that is actually a means of opening a portal to the dark side. The students who participate unknowingly start to have their minds filled with dark thoughts. Harry, with his natural resistance to the dark side, notices the change in his classmates and tries to stop the dance instructor before it's too late. He teams up with Hermione and Ron to figure out the true nature of this 'dark side dance' and close the portal.
Well, one possibility could be that Harry, feeling betrayed by the Order of Phoenix or perhaps influenced by some dark magic artifact, starts to question the motives of the good side. He might see how the Dark side offers power and a different kind of 'freedom'. For example, Voldemort could manipulate Harry by showing him how the wizarding world could be united under his rule, eliminating the in - fighting among pure - bloods, half - bloods and Muggle - borns, though of course this would be a false promise.
Well, it could be that the dark side has certain powers or artifacts that end up being the key to saving Harry in fanfiction. Maybe a dark wizard has a magical object that, when used in the right way, can reverse a curse on Harry or help him defeat Voldemort. The dark side's resources, which are often feared and shunned in the normal Harry Potter lore, can be turned into something positive for Harry's salvation in fan - made stories.
If the dark side saves Harry in fanfiction, it could open up a whole new world of story possibilities. Maybe it would involve Harry having to confront his preconceived notions about good and evil and find a way to balance the powers within him.
Well, one possibility could be that Harry is driven by a deep sense of betrayal. Maybe he discovers some dark secrets about the wizarding world that make him question everything he has believed in. For example, if he finds out that Dumbledore has been using him all along for some self - serving purpose. This could push him towards the dark side as he feels that the so - called good side is just as corrupt.
Perhaps Harry discovers some dark secrets about the wizarding world that make him lose faith in the good side. For example, he might find out that some of the so - called good wizards have been involved in immoral acts. This disillusionment leads him to think that the dark side might be a better option. As he joins them, he starts to abuse his power, using dark magic to get revenge on those who he believes have wronged him.
Harry is often developed as a conflicted character. He has the power of the Dark Lord, which brings out his more aggressive and power - hungry side, but deep down, his old self still exists. Ginny, on the other hand, is usually shown as strong - willed. She refuses to give up on Harry and is determined to bring out the good in him. For example, she might constantly remind him of their past and the values he once held.
One great fanfiction that explores the dark side in the Harry Potter universe is 'The Darkening of Hogwarts'. It delves into what would happen if dark magic seeped deeper into the school. The characters are faced with moral dilemmas and the story shows how the allure of the dark side can be both tempting and terrifying.
In this fanfiction, it could be that Stryker has been seeking a powerful being like Harry for a long time. When Harry is sold to him, Stryker first tries to study Harry's magic. Harry initially feels hopeless but then discovers a weakness in Stryker's security or plans. He uses his intelligence and the magic he still has access to, despite being in a difficult situation, to turn the tables on Stryker and eventually escape. This could also lead to Harry bringing down Stryker's whole operation to prevent others from being sold or used in the future.