Perhaps Voldemort discovers Harry's connection to Lady Sif and tries to use it to his advantage. He might try to steal some Asgardian magic or artifacts related to Harry's heritage. Harry then has to stop Voldemort while also dealing with the new - found knowledge of his mother and the Asgardian world.
Well, it could be really interesting. Maybe Harry would inherit some of Lady Sif's warrior traits. He might be even more skilled in combat magic, like having a unique fighting style inspired by Asgardian combat. And his connection to the magical world of Hogwarts could be intertwined with some Asgardian magic elements.
Another possibility is a story where a spell goes wrong in the Harry Potter world and opens a portal to Asgard. Harry and his friends end up in Asgard and meet Lady Sif. They form an alliance to stop an evil wizard who has also found his way to Asgard and is trying to steal Asgardian magic for his own dark purposes. Lady Sif could teach them some Asgardian magic while they introduce her to things like the Marauder's Map.
Well, perhaps there's a prophecy in both the wizarding world and Asgard that involves a person from each realm. Harry Potter and Lady Sif are chosen. They have to journey together, learning about each other's cultures and magics along the way, all while trying to fulfill the prophecy which might involve saving both their worlds from a great evil.
There are many great fanfiction platforms out there where you might find 'Harry Potter Lady Sif Romance Fanfiction'. One tip is to look for crossovers. Maybe there's a story where Lady Sif somehow ends up in the Harry Potter universe and a romantic relationship develops. It could involve her using her Asgardian powers in the wizarding world, which would make for a very interesting plot. You should also check the reviews and ratings of the fanfictions you find to ensure they are well - written.
Sure. Maybe Harry is raised by Tony Stark in particular. Stark tries to understand Harry's magic and even uses some of his technology to enhance Harry's magical items. For example, he modifies Harry's wand to be more powerful. When Harry is old enough, he wants to go to Hogwarts, but the Avengers are hesitant because they don't know what kind of place it is. This creates a conflict. Or perhaps an alien race attacks both the magical world and the Muggle world, and Harry has to bring the two worlds together to fight the common enemy.
Maybe they get transported to a strange new dimension where the rules of both their worlds are all jumbled up. They have to rely on each other to survive and find their way back home. During this time, they encounter strange creatures that are a mix of magical beasts and Greek monsters. And as they face these challenges, they grow closer as brothers and become even more powerful as individuals.
A possible plot could involve a dark wizard from the Harry Potter world teaming up with a powerful sea - based villain in the ship girl world. Harry has to form an alliance with the ship girls to stop them. Along the way, he discovers that there are hidden magical elements in the ship girl world that are connected to his own magic. He then uses this knowledge to strengthen the bond between him and the ship girls and ultimately defeat the villains.
Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own. Just search for 'Harry Potter and Lady Sif' and you'll likely find a variety of stories, some might be about them teaming up in a magical adventure, or perhaps a crossover story where the worlds of Harry Potter and Thor (where Lady Sif is from) collide in an interesting way.
Well, in this fanfic, a possible plot is that Harry's heritage as the son of Anubis makes him a target for dark wizards who want to use his unique powers. He then has to go on a journey to find out more about his father Anubis and the Egyptian magic that runs in his blood. Along the way, he might meet some Egyptian wizards or witches who teach him things that are completely different from what he's learned at Hogwarts.
One idea could be that Harry discovers his true parentage as the son of Zeus while at Hogwarts. This could lead to him having new powers, like the ability to control lightning. He might use these powers to defend Hogwarts in a new and unexpected way during a battle.