What are some interesting ideas in 'harry is lucifer's vessel fanfiction'?

Obviously, Harry is one of the main characters as he is the vessel. And Lucifer, of course, is a key figure as his essence is involved with Harry. There might also be other characters from the original Harry Potter universe, like Hermione and Ron, who could be trying to deal with the situation of Harry being Lucifer's vessel.

One idea could be that Harry, with his magical skills, somehow ends up in Lucifer's realm. He tries to find a way back home while Lucifer is intrigued by his magic and wants to learn from him. Another could be that they team up to fight a common enemy that threatens both the wizarding world and Lucifer's domain.

One interesting story could be about Harry teaming up with Lucifer to fight a common enemy from the magical and demonic realms. They might combine their unique powers and knowledge to overcome this threat.

One idea could be to explore a world where the characters from 'Lucifer' and 'Arrow' are forced to team up to stop a common supernatural threat that is beyond the capabilities of either group alone. For example, a powerful demon that is using advanced technology to cause chaos in both their worlds.

One idea could be that Lucifer, with his charm and manipulative skills, gets involved in the power struggles among the Autobots and Decepticons. He might try to use their war for his own amusement or to gain some sort of power. For example, he could offer a deal to Megatron to help him defeat the Autobots in exchange for something valuable in the underworld.

One idea could be exploring Lucifer's past before ruling Hell in the Hazbin Hotel universe. Maybe his rise to power, his relationships with other powerful entities at that time.

One idea could be that Lucifer from 'Lucifer' ends up in the 'Supernatural' universe and teams up with the Winchester brothers to fight a common enemy, like a powerful demon that's causing chaos in both their worlds. Maybe he uses his charm and powers in a unique way to help them out.

Yes, there might be such a fanfiction. The plot could involve Harry discovering his true parentage and struggling with the implications. He might have to deal with new powers that come with being Lucifer's son, and face opposition from the wizarding world who fear his dark heritage. Maybe he would also have to make a choice between the path of good and the temptations of the dark side his father represents.

One idea could be that Lucifer somehow ends up in the wizarding world. Maybe he's intrigued by the magic there and decides to play some tricks on the Hogwarts students. He could start by disguising himself as a new dark arts teacher, causing chaos in the classrooms.

Some fanfictions could explore the origin of the angel vessel in the context of the Harry Potter universe. It could be a creation of an ancient wizard who was inspired by the concept of angels from Muggle religions. And Harry, being the main character, has to figure out how to use the vessel's power without being corrupted by it, as it contains a great and mysterious force that could change the balance of good and evil in the wizarding world.