A plot twist might be that the Lightning Lord falls in love with the succubus instead of fighting her. This could completely change the direction of the story. Or perhaps the succubus is not what she seems and is actually a shape - shifted wizard who has a vendetta against the Lightning Lord. There could also be a plot twist where the battleground they are on has some hidden magic that affects their powers in unexpected ways.
One possible plot twist could be that the succubus is actually an ally sent by someone to test the Lightning Lord. Another could be that the succubus has a hidden power that can nullify the Lightning Lord's magic. Maybe she has a magical amulet that was not known before.
Well, it's a tough call. If we consider the nature of a succubus, they are very cunning and can manipulate emotions. However, the Lightning Lord has access to dark magic in the Harry Potter world. But if the succubus manages to get close enough to use her charm, it could be a different story. I still think the Lightning Lord has an edge because of his overall magical power and knowledge.
A 'Harry Potter Lightning Eater Succubus' in fanfiction is likely a fictional and imaginative creation. It could be an entity that combines different elements. The 'Lightning Eater' part may be a way to show its connection to a powerful energy source in the magical world of Harry Potter. Lightning is often seen as a very strong and dynamic force. The 'succubus' element brings in the idea of a female - like being with seductive powers. In fanfiction, this could be used to create interesting plotlines, such as the succubus using her powers to influence Harry or his friends, or perhaps being involved in a mystery related to the consumption of lightning as a form of magic.
A plot twist might be that when Harry goes to Voldemort, he discovers that Voldemort has a secret weakness. Maybe it's related to his family or some long - forgotten magic. Harry then has to decide whether to use this weakness against Voldemort or try to redeem him. This would add a whole new layer of complexity to the story. Another aspect could be that there are other forces at work, like a third - party wizard who is manipulating both Harry and Voldemort for their own gain, and Harry has to figure out who this is while dealing with Voldemort.
Another plot twist could be that the magic in the Harry Potter universe is actually a precursor to the Force. Harry Potter discovers that his magic has the potential to evolve into the Force - like powers. This revelation makes him question his place in the wizarding world and whether he should pursue a different path, one that is more in line with what Luke Skywalker represents in the Star Wars universe.
One possible plot twist could be that the daughter of death is initially thought to be on the side of evil but is actually a key to saving the wizarding world. Another could be that she has a secret connection to a major character from the original series that changes everything. Maybe she's related to Dumbledore in some way.
One possible plot twist could be that Lucius Malfoy has a secret alliance with Dumbledore all along and saves Harry to fulfill some greater plan against Voldemort. Another could be that Narcissa Malfoy, out of a mother's love for all children (not just her own), decides to protect Harry. Or perhaps Draco Malfoy betrays Voldemort's orders to kill or capture Harry because he has developed an unexpected friendship with Harry during their years at Hogwarts.
One possible plot twist could be that the female Harry Potter's kitsune nature is kept a secret from her friends at Hogwarts for a long time, and when it's finally revealed, it causes a rift in some of her relationships because they don't understand or are afraid of her new form.
One possible plot twist could be that Harry discovers he's not actually a vampire lord in the traditional sense, but a new kind of hybrid created by an ancient magic. This would completely change his understanding of himself and his place in the vampire and wizarding worlds.
One plot twist could be that Harry is actually a double agent. He pretends to be fully under Voldemort's control while secretly working against him. Another could be that Voldemort's training awakens a hidden power in Harry that is neither good nor bad, but something completely unexpected that changes the whole dynamic of the wizarding world.
A plot twist could be that Dudley has some latent magical ability that is awakened when he is in a life - or - death situation with Piers. This would completely change their relationship with Harry as now Dudley is also part of the magical world in a way.