In the fanfic, Harry could find friends from different time periods who have been magically preserved. These friends share their knowledge of the past and future of the wizarding world with Harry, which gives him a new perspective on his role in the present. They might also have different magical traditions that Harry gets to learn about, like ancient spells or rituals.
Perhaps Harry discovers a group of magical creatures that can communicate with him in a special way. These new friends introduce him to a whole new side of the magical world that he was previously unaware of. For example, they might show him hidden places where rare magical plants grow that can be used for powerful potions.
Maybe a house - elf who has broken free from the traditional servitude mindset. This house - elf has developed their own magic in a different way and befriends Harry. They teach Harry about the hidden magic that house - elves possess, which is not taught in regular Hogwarts classes.
One possible plotline could be Harry's initial confusion when he stumbles upon the One Ring. He might wonder about its strange power and how it seems to call to him in a way different from magic he's used to.
A great plotline is when they bond over their difficult family situations. Harry has his issues with the Dursleys and Draco has the pressure from his pure - blood supremacist family. They could find common ground in their struggles against the expectations placed on them. This might lead them to support each other in ways that surprise their classmates and teachers alike, like Draco standing up for Harry against Snape's unfair treatment, or Harry helping Draco break free from his family's dark influence.
One possible plotline could be that Harry discovers new magical abilities related to the concept of death. For example, he might be able to communicate with the spirits of the dead in a more profound way than just using the Resurrection Stone. Another could be that his friendship with 'death' gives him a unique perspective on life and sacrifice, leading him to make different choices in his battles against Voldemort.
In the fanfiction, it could be that Harry's friendship with Death is a secret known only to a few. He has to hide it from most of the wizarding world because they would not understand. This secrecy could add a lot of tension to the story. For instance, when strange things start to happen around Harry, like people seeing shadowy figures or experiencing unexplained chills, some might suspect dark magic. But in reality, it's just a side - effect of his connection with Death. Harry would have to struggle to keep his friendship a secret while also using the knowledge he gains from Death to protect his friends and the wizarding world.
One possible plotline could be Harry struggling to adapt to the new social expectations of being a girl in the wizarding world. For example, she might face different treatment from her male friends at Hogwarts.
Another plotline might involve Harry forming unique alliances with other druids. They could work together to protect an ancient druidic site from dark wizards who want to use its power for evil. This would lead to some exciting battles and magical duels.
Perhaps it focuses on his reasons for becoming a thief. It could be that he was forced into it by some difficult circumstances in his life. Like he was wrongly accused of something and had no way to prove his innocence, so he turned to stealing to survive and seek revenge.
In 'harry is a king fanfic', a possible plotline is Harry having to deal with a rebellion. He would need to use his wits and leadership skills to quell it. Also, his love life might be intertwined with his role as king, like falling in love with a princess from another land which could have political implications.
One interesting plotline could be Harry's journey to master new paladin skills. For example, he might have to overcome challenges in a magical forest to find a rare weapon or spell that enhances his paladin abilities.