In a fanfiction, the Phoenix and the Basilisk could be two parts of an ancient prophecy. Harry Potter is the one foretold to either unite them or destroy one to save the other. Along the way, he has to learn about the true nature of both creatures. He might find that the Basilisk isn't as purely evil as it seems and the Phoenix has a more complex role than just being a symbol of good. This could lead to a very engaging story full of moral dilemmas and exciting magical encounters.
A plot could revolve around a hidden prophecy that links the Basilisk and the Patronus. A young witch or wizard discovers this prophecy and realizes that they are the key to either saving or destroying the wizarding world. They must then navigate the dangerous relationship between the two magical entities. This could involve traveling back in time to learn about the origins of the Basilisk and the true nature of the Patronus magic, which could be much deeper and more complex than what was taught at Hogwarts.
A great plot for fanfiction could be a time - travel story. A wizard travels back in time to the era when the basilisk was first created or brought to Hogwarts. With the help of a special wand, they try to change the course of history regarding the basilisk. But every change they make has unforeseen consequences. For example, they might prevent the basilisk from being killed in the past, which then creates a new and more dangerous threat in the present. So, they have to find a way to fix what they've messed up while still dealing with the power of the basilisk and the wand.
Well, a great plot in harry potter and phoenix fanfiction could be about the Marauders' Map falling into the wrong hands. This could lead to a whole new set of adventures and dangers for Harry and his friends. Also, fanfiction could explore the backstories of some of the minor characters in the Order of the Phoenix. What if one of them had a hidden connection to Voldemort's past? It would add a new layer of mystery and intrigue to the story.
In 'harry potter basilisk hybrid fanfiction', there might be a focus on the hybrid's origin. Maybe it was created by dark magic gone wrong or as an experiment. It could also explore the hybrid's relationship with other characters. Like, would Hermione try to understand it scientifically? Or would Ron be afraid of it at first? And perhaps there are adventures where the hybrid uses its combined abilities to overcome challenges in the wizarding world.
Perhaps a fanfiction where the Basilisk is not a solitary monster but part of a larger, more complex ecosystem in the Chamber of Secrets. There could be other magical creatures that depend on the Basilisk in some way, and when the Basilisk is in danger, these other creatures come to its aid. This would change the whole dynamic of how the characters interact with the Basilisk and the Chamber of Secrets.
Another interesting plot could be that the Basilisk Animagus is an ancient magical being that has been awakened in modern times. Harry Potter and his friends have to figure out how to communicate with it and learn from it. The Basilisk Animagus could teach them new spells or ways of using magic that have been forgotten. They could go on a journey together to discover the origin of certain magical artifacts, all while building a relationship based on mutual respect and not involving any sexual elements.
One interesting plot twist could be that Harry discovers he has the ability to communicate with the Basilisk on a deeper level than just Parseltongue. Maybe he can see through the Basilisk's eyes and use this to his advantage in uncovering secrets within Hogwarts that even Dumbledore doesn't know. Another could be that the Basilisk is not truly a villain but was being controlled by a dark force all along, and Harry has to find a way to break that control and free the Basilisk.
One interesting plot twist could be that the basilisk has an unexpected alliance. Maybe it teams up with a group of outcast magical creatures to take revenge on those who have wronged them. This would completely change the dynamic as in the original, the basilisk is mainly a tool of Voldemort.
Perhaps he could use his phoenix form to travel to places that are otherwise inaccessible. He could fly to the Forbidden Forest's most secret corners and discover new magical creatures or ancient magic. Also, his rebirth as a phoenix might give him the power to communicate with other phoenixes, and they could pass on their ancient wisdom to him.
In some fanfictions, a plot idea is to have Harry gain a new power. In the context of 'Harry Potter Order of the Phoenix', it could be a power related to his connection with the late Sirius Black. For instance, he might be able to communicate with Sirius in a new way, like through dreams more vividly. This could change the way he approaches his fight against Voldemort and the Death Eaters. Also, a plot could involve the Ministry of Magic having a more complex internal struggle that affects the Order's operations.