Another interesting plotline could be that the ogre comes from a different dimension and gets lost in the Harry Potter universe. It then has to find its way back home while dealing with all the magic and mystery of the wizarding world, which is full of strange spells, potions, and different species of magical beings.
Perhaps a plotline where the ogre has some sort of special power that the wizards in Harry Potter are interested in. This could lead to a whole series of events where they try to either control or cooperate with the ogre.
The physical presence of ogres is also a unique aspect. Ogres are big and strong, so they can add a different dynamic to action scenes. In fanfictions, they might be involved in battles or challenges where their brute strength becomes a crucial factor. Also, their appearance can be quite intimidating compared to the more 'human - like' wizards and witches.
In some fanfiction, a familiar might get lost in a different dimension. So, the main character has to go on a journey to find it. Along the way, they meet strange new creatures and learn new spells, which is really exciting. It also shows a different side of the bond between a wizard and their familiar.
There could also be a fanfiction where a member of the Sacred 28 discovers a long - lost family secret that has the potential to change the power dynamics among the pure - blood families. This secret could be related to a hidden magic or a forgotten alliance, and as they try to uncover more about it, they face opposition from other families who fear the change it might bring.
A common plotline is the characters' post - graduation plans. Some fanfictions might explore how Harry, Hermione, and Ron decide on their career paths. Maybe Harry is conflicted between becoming an Auror or a teacher at Hogwarts. Hermione could be considering further studies in ancient magic, and Ron might be thinking about joining his brothers in the joke shop business. This exploration of their future dreams and how they support each other during this transition period can be really engaging.
One possible plotline could be that Harry is wrongly expelled due to false accusations by a dark wizard who has infiltrated Hogwarts. Harry then has to prove his innocence while on the run from the Ministry. Another plotline might involve Harry being expelled because of a new, strict and unjust headmaster who has a vendetta against him. He could then start his own school for outcast witches and wizards.
Perhaps the snake is a transformed wizard who was cursed. This would lead to a plot where Harry has to find a way to break the curse. He might have to go on a quest to find rare ingredients for a potion. Along the way, he and the snake face various challenges, like dark wizards trying to stop them, and they form a strong friendship through their shared experiences.
One interesting plotline could be where Harry discovers a hidden magic that was lost for centuries. This new magic gives him unique abilities and he has to figure out how to use it without Voldemort finding out. It could change the whole dynamic of the fight against the Dark Lord.
One interesting plotline could be a massive wizarding battleship battle where Hogwarts students and Death Eaters engage in a sea - based fight. The battleship could be enchanted with all sorts of magic, like shields made of Patronus charms.
Another plotline could involve a character jumping into different points in the Harry Potter timeline. They could interact with characters at different ages, like meeting a young Dumbledore and influencing his early views on magic. This would create a whole new set of relationships and story developments. Also, there could be a plot where a character uses the jumpchain to enter the world of Harry Potter from a completely different fictional universe, bringing with them their own set of skills and knowledge which then disrupts or enriches the magical world as we know it.
One interesting plotline could be how Harry's Veela heritage affects his relationships. For example, it might make his interactions with Hermione and Ron more complex as they deal with this new aspect of him. Another could be how his Veela side influences his magical abilities, perhaps giving him an edge in certain spells or magical duels.