Another idea is that some of the magical creatures from Harry Potter could find their way into Lucifer's world. For instance, a Dementor could escape into Lucifer's LA. This would be a huge problem as Dementors feed on positive emotions. Lucifer and his team would be quite confused by this strange, black - cloaked creature. Harry, being an expert on Dementors, would come to the rescue and together they would figure out a way to send the Dementor back to the wizarding world or find a way to destroy it in Lucifer's world.
A crossover could also involve the characters' moral compasses. Harry is known for his strong sense of right and wrong, while Lucifer is, well, the Devil. But in the Lucifer series, he has his own code. They could have some really interesting debates about morality. Maybe Harry has to convince Lucifer to help him save a group of innocent people who are being used in a dark magic experiment. And in the process, Lucifer might learn a thing or two from Harry about self - sacrifice.
One interesting crossover could be a scenario where Harry Potter is transported to Lucifer's world in Los Angeles. Maybe he needs Lucifer's help to defeat a new kind of dark magic that has some connection to the infernal realm. For example, a dark wizard has made a pact with a minor demon and is causing chaos in both the wizarding world and the human world. Harry, with his knowledge of magic, and Lucifer, with his understanding of the supernatural in his own realm, could team up to solve the problem.
Well, in some fanfictions, Lucifer Morningstar could be curious about the magic in the Harry Potter universe. He might visit Hogwarts in disguise and cause chaos. He could interact with Dumbledore, who would be very cautious of him. There could also be a fanfiction where Harry Potter and his friends have to go to Hell (Lucifer's domain) to retrieve a lost magical artifact and face all kinds of devilish challenges along the way.
One interesting plot twist could be that Harry's true nature is revealed during a crucial battle. Instead of using his normal wizarding spells, he taps into his Lucifer - given powers and turns the tide in a way that no one expected. But this also makes everyone around him question who he really is.
Harry's Patronus charm, which is a manifestation of positive energy, could have an interesting reaction when in the presence of Lucifer. Since Lucifer is associated with the underworld and negative forces in a way, the Patronus might act as a counterbalance or even a repellent to some of the darker aspects of Lucifer's world. At the same time, Lucifer's power to see people's desires could help Harry understand the motives of his enemies better. For example, if they were facing a dark wizard who had some hidden desires that were fueling his actions, Lucifer could reveal those, and Harry could then use that knowledge to find a way to defeat the wizard using his magic.
They can be combined by having a common enemy. Suppose there is a new dark force that threatens both the wizarding world and Lucifer's world. Harry Potter and Lucifer Morningstar would then have to team up to fight it. This would bring together their different powers and ways of thinking. Also, a character from one world could be cursed to live in the other world, which would create interesting storylines as they try to adapt and find a way back.
One interesting 'Harry Potter Morningstar' fanfiction could be one where Morningstar is a new student at Hogwarts with a mysterious past. Maybe they have a special power that even the professors are baffled by. Another could be a story where Morningstar teams up with Harry Potter to solve a new dark mystery that threatens the wizarding world.
Well, you could have a plot where the OC is a singer in a club that Lucifer frequents. He's drawn to her voice and her free spirit. As they get to know each other, the OC discovers Lucifer's devilish side but isn't afraid. This could lead to a relationship where they both learn from each other. Also, the OC could be a journalist trying to expose Lucifer's secrets, but instead falls in love with him during the process.
No. Percy Jackson is a series in its own right with its own unique mythology and characters, having no relation to being a fanfiction of Lucifer Morningstar.
One interesting 'lucifer harry potter fanfiction' story could be about Lucifer somehow getting involved in the wizarding world of Harry Potter. Maybe he tries to corrupt the students at Hogwarts. Another could be where he teams up with Voldemort, creating a really dark and dangerous alliance.
One interesting storyline could be a magical battle between Harry Potter's world and Lucifer's forces. Maybe Lucifer tries to invade Hogwarts to steal its powerful magic for his own dark purposes, and Harry and his friends have to use both their wizardry skills and some new, unexpected powers to fend him off.
Well, in some fanfiction, we might see Anna and Kristoff visiting Hogwarts. They could be amazed by the moving staircases and magical creatures. In reverse, Harry, Ron and Hermione could end up in Arendelle. Hermione might be intrigued by the way Elsa controls her ice powers and try to find a scientific or magical explanation for it. Also, the Dementors from Harry Potter could be compared to the dark forces in Frozen 2, like the mist that Elsa has to face.