The 'harry potter is the shadow king fanfiction' could be a really interesting take on the Harry Potter series. It might be that the author saw some similarities between Harry Potter and the idea of the Shadow King. Harry has always been in a fight against dark forces in his own world, and the Shadow King often represents a powerful and somewhat dark entity in its own context. So this fanfiction could be about Harry taking on a new form of power or identity as the Shadow King, or perhaps he has to battle an entity similar to the Shadow King within the wizarding world. This could lead to all kinds of new adventures, changes in his relationships with other characters, and a whole new exploration of the magic in the Harry Potter universe.
Perhaps Harry discovers he has some connection to a shadow demon. Maybe it's a hidden part of his magic that he has to explore while still dealing with the challenges at Hogwarts, like fighting Voldemort. The shadow demon aspect could add a new level of darkness and mystery to his character and the overall story.
A major theme is the combination of two different worlds or concepts. Here, it's the world of Harry Potter and the idea of a shadow warrior. This often leads to characters having to adapt to new rules and abilities. For example, a character who was used to the magic of spells in Hogwarts now has to learn how to use shadowy powers like stealth and shadow - based attacks. Also, friendship and loyalty remain important themes as characters rely on their friends to help them in their new journey as shadow warriors.
A theme that often shows up is the struggle between good and evil. In the Harry Potter series, this is a central theme. When the Shadow Panther is added to the mix, it can be part of the fight against evil. Maybe it has some special ability that can help in the battle against dark wizards. Or it could be that the Panther is initially misunderstood and thought to be on the side of evil but is actually a force for good.
Hermione Granger often features prominently. Her intelligence and thirst for knowledge make her a great candidate to explore shadow magic. She might be the one to uncover ancient texts about it and start experimenting.
Well, in many Harry Potter fanfictions, 'Shadow 101' could potentially refer to a spell, a secret organization, or a special class at Hogwarts. It might be something unique to the author's imagination. For example, it could be a spellcasting technique that only a select few students in Daphne's year are learning. It might also be related to some sort of shadow magic that has a deeper meaning within the story.
A possible plot could be that Harry Potter somehow gets transported to Middle - earth where the events of 'Shadow of Mordor' take place. He could use his magic skills to fight against the forces of Sauron in a unique way. Maybe he teams up with Talion and they combine their powers, Harry's magic and Talion's wraith - like abilities, to take on the orcs and other dark creatures.
You could try looking on some popular fanfiction websites like Fanfiction.net or Archive of Our Own. They have a large collection of fanfictions, and there's a good chance you'll find it there if it exists.
There could be a fanfiction where the shadow werewolf is actually a long - lost relative of a main character. This werewolf has been in hiding due to the stigma of lycanthropy, but is drawn out by the events in the wizarding world. For example, during the Triwizard Tournament, the shadow werewolf emerges to help the hero in a dangerous task.
One interesting plotline could be a character discovering a new form of shadow magic that has been long forgotten in the wizarding world. This could lead to a race against time to master it before the dark forces do.