Another plot development could be that the hand cannon was created by a group of rebel wizards in the past who were against the established magical order. Harry using it could make him a target of those who still uphold the old ways. This would put him in a difficult position as he tries to use this new tool for good while facing opposition from within the wizarding community.
Maybe it was given to him by a mysterious stranger. This stranger could be someone who has been observing Harry from afar and believes that he is the only one who can handle the power of the hand cannon. The stranger appears out of nowhere, hands it to Harry, and then disappears again without a trace.
Maybe Harry starts using lethal force against Death Eaters. This could lead to a more vengeful and darker path for him. His friends might be divided in their support for him.
One popular 'Harry Potter uses sleight of hand' fanfiction might involve him using sleight of hand to perform magic tricks in a Muggle - style way during a Hogwarts event. It could add a unique and fun twist to the magical world we know.
Well, in this type of fanfiction, a possible plot development is that Harry Potter uses his god - like powers to reshape the wizarding world. He could create new spells or magical creatures. Also, his ascension might attract the attention of other powerful entities from different mythologies. This would lead to either alliances or epic battles as he tries to assert his new - found divinity.
One interesting plot could be Harry struggling to fit in with the Slytherin ideals at first. He might be constantly at odds with some of the more traditional Slytherin values like pure - blood supremacy. But then he could gradually change the house from within, making his Slytherin peers see that not all Gryffindor traits are bad and vice versa.
In some fanfictions, Harry might use necromancy to bring back important figures like his parents. This could lead to complex emotional and moral dilemmas as he tries to interact with them in a world that has moved on without them.
One interesting plot development could be the evolution of magic in ways not seen in the original books. For example, a new form of spellcasting that combines different magical disciplines. Maybe a character discovers how to use Transfiguration and Charms simultaneously to create a unique magical effect.
Well, a possible plot development is her struggle with identity. Since she has the memories of Harry but is now a girl, she may have an internal conflict. She might wonder if she should still follow the same path as Harry did in the original story. Also, in terms of magic, she could discover new ways of using magic that were perhaps not explored by Harry because of the different way she experiences the magical world as a female. For instance, she could have a special connection with certain female - centric magical creatures or spells that are more attuned to her new gender. And her presence as a girl could inspire other female characters in the wizarding world to be more assertive and strive for more equality in magic education and other aspects.
One possible plot development could be that Harry is initially confused and resistant to the king's advances. He might be more focused on his own battles against Voldemort or his studies at Hogwarts, and this new situation throws him off balance.
In some fanfictions, Harry inheriting a fortune could lead to him having more political power in the wizarding world. He could use this to change laws that are unfair to certain magical creatures or groups. For example, he might fight for the rights of house - elves. He could also use his money to fund research on dark magic prevention, making the wizarding world a safer place.