Well, perhaps in the fanfiction, Draco Malfoy is researching a way to counter the Avada Kedavra. He could be secretly working with some of the more intelligent and magically inclined students at Hogwarts. They might be trying to find a protection spell that can block the Avada Kedavra. This could lead to a lot of sneaking around, secret meetings in the Room of Requirement, and tense moments when they think they're about to be discovered by the Death Eaters or other dark forces.
A possible plot could be that Draco Malfoy witnesses the power of the Avada Kedavra up close when it's used on someone he cares about, like his mother. This shatters his view of the Dark Arts. He then decides to use his knowledge of the curse to try and find a way to prevent it from ever being used again. He might start by looking into ancient magic texts, consulting with the ghosts at Hogwarts, and even reaching out to some of the more reclusive magical creatures in the Forbidden Forest in his quest.
He could be hit by a weakened or deflected version of the curse. Maybe someone tried to cast it on him but another spell interfered at the last moment. This could leave him with some strange side - effects, like temporary memory loss or a change in his magical abilities.
One interesting 'Harry Potter Avada Kedavra' fanfiction could be one where a character manages to reverse the effects of the Avada Kedavra curse through some ancient magic. In this type of fanfiction, it might explore the idea of life after being hit by the Killing Curse and how magic can be used in ways not previously thought of in the original series.
One idea could be a story where Scorpius discovers a long - hidden family secret that Draco has been trying to protect him from. It could involve some dark magic from their family's past.
In my opinion, it depends on how it's done. If the fanfiction is using Harry using Avada Kedavra in a context that is meant to shock and go against the core values of the series just for the sake of being edgy, then it's unethical. But if it's part of a well - thought - out exploration of the character's growth, for example, if Harry is corrupted by dark magic in an alternate universe, and the story is used to teach a lesson about the dangers of straying from one's values, it could be seen as a valid creative piece.
A possible plot for Draco Malfoy childhood fanfiction is his secret love for something that goes against the Malfoy image, like a Muggle - like hobby. This could create internal conflict within him. Another idea is his experience during the first time he used a broomstick. It could be a story of his excitement and determination to be good at it, but also his fear of failure. And a third one could be about how he coped with the news of having to go to Hogwarts, whether he was eager or reluctant.
One plot idea could be that Draco Malfoy accidentally stumbles into the Muggle world and meets a Muggle who is a huge fan of the wizarding world through books. The Muggle helps Draco see the beauty in the Muggle way of life, and Draco in turn shows the Muggle some magic in a very secretive way. They form an unlikely friendship that challenges Draco's pure - blood beliefs.
A great plot could involve Draco being forced to team up with a group of Ravenclaws for a special project at Hogwarts. At first, he's reluctant, but as he gets to know them, he begins to appreciate their different way of thinking. Maybe they're all trying to solve a mystery that has been plaguing the school, and Draco's Slytherin cunning combined with the Ravenclaws' intelligence makes for an exciting adventure.
A really interesting plot could be that Draco's transformation into a girl is part of a bigger magical mystery. She starts to notice strange things happening around Hogwarts that seem related to her change. As she tries to figure out what's going on, she teams up with unlikely allies from different houses. Along the way, she also has to deal with the prejudice and confusion from some of the wizarding community who don't understand or accept her new identity.
One idea could be a post - war story where Astoria helps Draco heal from the traumas of the war. They could start by bonding over their shared Slytherin heritage and gradually fall in love as they work through their inner demons.
One idea could be Draco secretly trying to solve the mystery of the Chamber of Secrets on his own, not because he wants to help the Muggle - borns but to prove he's better than Harry at finding things out. Another could be a fanfiction where Draco has a change of heart due to an encounter in the Chamber and starts to question his family's beliefs about blood purity.