What are some interesting plotlines in 'Harry Potter raised by Regulus Black' fanfiction?

A possible plotline is the impact on Harry's personality. Being raised by Regulus, who was once a Death Eater but had a change of heart, might make Harry more complex. He could have a better understanding of the gray areas in the wizarding world. For example, he might not be as quick to judge Slytherins. And in terms of the overarching story, there could be a new take on the prophecy. Maybe with Regulus' influence, Harry interprets the prophecy in a different way that changes the whole course of the battle against Voldemort.

One interesting plotline could be a mystery - solving one. Harry discovers some strange artifacts in Grimmauld Place that were left by Regulus. With Sirius (if he's alive in the fic), they try to figure out what these artifacts mean and it leads them to uncover a long - forgotten plot by Voldemort. Another plotline could be a redemption arc for Regulus. Harry, after learning about Regulus's attempts to undermine Voldemort, tries to clear his name in the wizarding world, which causes some friction with those who still see the Black family as mostly dark wizards. And there could be a plotline about family secrets. Sirius and Harry find out that there are hidden magical abilities in the Black family bloodline that only Regulus knew about, and they have to figure out how to use or control them.

One interesting fanfiction could be about Regulus Black's secret adventures during his time at Hogwarts that were not mentioned in the original books. It might explore his relationships with other Slytherins in more depth, and how he really felt about the Dark Lord's rising power.

One possible plotline could be Harry growing up with a different set of values and magical training compared to his canon upbringing. For example, he might be more attuned to the Dark Arts defenses early on, as the Black family has a history with that. Another could be his relationship with Sirius being much closer and more of a brotherly - fatherly bond from the start. Also, the Black family's pure - blood mania might influence Harry in unique ways, like making him more aware of the wizarding world's class system at a young age.

One common plotline is Regulus joining the fight against Voldemort after faking his death. He uses his knowledge of the Death Eaters to help the Order of the Phoenix. Another is his relationship with Sirius. They get a chance to reconcile and work together.

One possible plotline could be that the Potter elves teach Harry unique magic that is different from what he would learn at Hogwarts. For example, they might show him ancient elf magic that gives him an edge in dealing with dark forces. Another could be that the elves raise Harry with a strong sense of family and loyalty, which makes him more empathetic towards those who are often overlooked in the wizarding world, like house - elves themselves.

One possible plotline could be that Charlus Potter imparts unique magical knowledge to Harry. Since he's from an older generation, he might teach Harry some long - forgotten spells or magical traditions. Another could be that Harry grows up with a different social circle, perhaps more connected to the old pure - blood families through Charlus. And also, Charlus might train Harry in a more traditional and strict way of magic compared to what Harry would have experienced at Hogwarts with Dumbledore.

Obviously, Harry Potter and Regulus Black are the main ones. Harry as the boy who lived, and Regulus as his guardian, would be central to the story. Their relationship would be explored deeply.

One interesting 'Harry Potter and Regulus Black' fanfiction could be one where Regulus helps Harry in secret ways during his time at Hogwarts. For example, he might leave behind hidden clues about Voldemort's Horcruxes that only Harry can find.

One interesting plotline could be how Harry's view of the wizarding world changes. Since he is raised by giants, he might see magic in a more primal and powerful way compared to those raised in the wizarding society. He could have a different understanding of things like spells and potions, perhaps seeing them as more like tools for survival rather than just for academic or social purposes.