Fanfiction about Harry Potter as a Blade Master: What are some interesting plots?

One interesting plot could be that the main character, who has assassin skills, is secretly protecting Hogwarts from a new and unknown dark threat that the regular wizards can't detect easily. They use their unique combat skills along with magic to keep the school safe.

One interesting plot could be a character using arithmancy to predict the return of a dark force. They might discover hidden patterns in numbers related to past dark events and use that knowledge to try and prevent a new threat.

One interesting plot could be Harry discovering a new, hidden magical ability that was not part of the original books. For example, the power to communicate with magical creatures on a deeper level. Another plot might involve Harry traveling to a different magical dimension where the rules of magic are completely different. He would have to adapt and use his skills in new ways.

Maybe in the fanfiction, Harry becomes the master of alchemy and uses it to create magical potions with extraordinary powers. For example, he might create a potion that can temporarily give students the ability to speak to animals, which leads to all kinds of adventures as they communicate with the magical creatures around Hogwarts.

One interesting plot could be that Harry Potter, as the Master of Death, encounters Aphrodite in the wizarding world. Maybe Aphrodite is intrigued by the concept of death in the wizarding realm and wants to learn more. Harry, in turn, is fascinated by her powers of love and beauty. They could team up to help a young wizard who has lost all hope and love due to a dark magic curse, with Aphrodite using her love - inducing powers and Harry using his mastery over death to free the wizard from the curse's hold on his soul.

Well, some fanfictions might have a plot where the dark arts master has a unique connection to an ancient and powerful dark magic artifact. This connection could drive the story as the character tries to either master the artifact's power or keep it from falling into the wrong hands, all while dealing with the challenges in the Harry Potter universe like avoiding the Ministry of Magic's detection.

Voldemort or his remaining Death Eaters could be the main enemies. They would see Harry's new blade master abilities as a threat. Another potential enemy could be a dark wizard from a foreign land who is jealous of Harry's power.

In some Harry Potter 8 fanfictions, there are plots where the characters continue to face new dark magic threats. For example, a new dark wizard might emerge, and Harry, Hermione and Ron have to use their combined skills and knowledge to defeat this new foe. Another plot could be about the exploration of the wizarding world's past in more depth, revealing secrets that were previously unknown.

One interesting plot could be about the Potter family's hidden secrets being unearthed. Maybe there are ancient spells or prophecies related to them that no one knew before. Another could be a story where the Potter family has to face a new and powerful dark force that is specifically targeting them due to their legacy. And a third plot might involve time - traveling within the Potter family's history to correct past mistakes or learn from them.

There might be a story where Harry Potter discovers a hidden connection between his magic and Blade's powers. They could team up to fight a new kind of dark magic that is related to vampires or other dark forces. This would be a great way to blend the two universes.