What are some interesting plotlines in 'Percy and Harry are immortal fanfiction'?

A common plotline is them working together to solve a mystery within Hogwarts. For example, in some fanfics, they might be trying to figure out who is behind a series of strange magical occurrences in the school.

A possible plotline is their different magical abilities. Percy might be really good at transfiguration and charms, while Harry has his natural talent for defense against the dark arts. They could compete in a friendly way, but also learn from each other. For instance, Percy could teach Harry some advanced transfiguration spells, and Harry could show Percy some new defense techniques he learned from his experiences.

Perhaps a plotline where Harry discovers other immortal beings. He could form a sort of community with them, learning about different cultures and powers that immortality has bestowed upon them. They might teach him how to better control his immortality, like hiding his true nature from mortals or using his extended lifespan to gain knowledge that no one else has. This could lead to adventures as they try to protect their secret from those who would seek to exploit it.

One interesting plotline could be Harry fully exploring and mastering the powers that come with being the Master of Death. He might use these newfound abilities to reshape the wizarding world, like eliminating dark magic at its roots.

One possible plotline could be Percy's struggle with his new godly powers and how it affects his relationships. For example, his friends might be in awe or a bit intimidated by his new status.

One possible plotline could be Percy having to adjust to the unique rules and traditions of the hunters. For example, dealing with their vow of celibacy in a humorous or challenging way. Another could be Percy going on a special hunt with the hunters that involves a mythical creature not commonly associated with them.

One possible plotline could be their adventures in a new, undiscovered part of the mythological world. Maybe they stumble upon a hidden realm full of ancient and powerful creatures that they have to either befriend or fight.

Well, perhaps in this 'percy is an orphan fanfiction', there's a plotline where Percy is constantly bullied because he's an orphan. But then he discovers a hidden power within himself that not only helps him stand up to the bullies but also starts to unravel a mystery related to his family. Maybe he finds out that his parents were part of a secret organization and their disappearance was not accidental.

One interesting plotline could be them teaming up to rescue a captured demigod. They could use their unique abilities, Percy's water - related powers and Bianca's skills with a certain weapon or magic. Another plotline could be them exploring an unknown part of the mythological world together, facing strange creatures and ancient puzzles.

Perhaps a plotline where Percy has a different personality. Instead of being the brave and somewhat impulsive hero, he could be more reserved and calculating. This change in character would greatly affect his relationships with other characters and the way he approaches challenges in the story.