In this fanfiction, perhaps the Blue - Eyes White Dragon's scales have some special properties that are useful in potion - making in the Harry Potter universe. Harry, being an inquisitive wizard, tries to study the dragon and its scales. He finds that when combined with certain magical plants, the dragon scales can create a potion that gives temporary invincibility. This leads to a whole new adventure as Voldemort also gets wind of this and tries to steal the dragon for his own evil purposes.
One interesting 'Blue Eyes White Dragon fanfiction' story could be about it forming an unexpected alliance with a group of underdog monsters. In this story, the Blue Eyes White Dragon, instead of being in its usual dominant role, has to rely on the unique abilities of the weaker monsters to overcome a powerful dark force. It shows a different side of the powerful dragon, highlighting its intelligence and adaptability.
There could be a fanfic where the Blue Eyes White Dragon forms an unexpected alliance with other monsters. In this story, they team up to face a greater evil that threatens the entire duel monsters world. This would involve a lot of action - packed duel scenes and character development for the dragon.
The Blue - Eyes White Dragon could be a part of a prophecy in the fanfiction. Just as Harry was part of a prophecy in the original story, the dragon could also be foretold to play a crucial role. It might be that the dragon's arrival signals a new era in the wizarding world, and Harry has to figure out how to work with it to defeat a new and greater threat than Voldemort.
One interesting crossover could be the use of magic systems. In Harry Potter, magic is more about spells and potions, while in Dragon Age, it has a different lore. A fanfiction might combine the two, like having a Hogwarts student discover the magic of the Fade in Dragon Age. Another could be character interactions. Imagine Hermione meeting Morrigan. They are both strong - willed and intelligent, and their conversations would be full of debates and exchanges of knowledge.
One possible fanfic could be about a female Blue - Eyes White Dragon who embarks on a journey to find her true purpose. She might encounter various other magical creatures along the way and form unexpected alliances. For example, she could meet a young wizard who is in need of her power to defeat an evil sorcerer. Together, they could go through many trials and tribulations, with the dragon gradually learning about the power of friendship and her own inner strength.
A really interesting plot could be that in the fanfiction, the Blue - Eyes White Dragon gets injured in a battle. Seto Kaiba then has to search for a rare and ancient remedy to heal it. Along the way, he meets different characters from the Duel Monsters universe who either help or hinder his quest. This journey could explore Seto Kaiba's character more deeply, showing his determination and loyalty to the Blue - Eyes White Dragon.
A great aspect of crossovers in this fanfiction can be the character interactions. Imagine Harry Potter characters like Hermione being in the world of Dragon Age Origins. She could use her intelligence to understand the complex lore and magic of that world, perhaps even helping the protagonists in Dragon Age Origins to solve some of their problems regarding ancient magic or forgotten spells.
Some crossovers might involve the Dragon Balls being used in the Harry Potter universe. Maybe the wizards would be very interested in the power of the Dragon Balls to grant wishes. For example, Dumbledore could be intrigued by their potential and try to study them. Or Harry Potter himself could accidentally find a Dragon Ball and have to figure out what it is while also dealing with Voldemort. It would be a wild mix of two very different magical worlds.
One interesting crossover could be the use of magic systems. In 'Harry Potter', magic is more about spells and potions, while in 'House of the Dragon' there is a different kind of magic related to dragons. Maybe a story where a Hogwarts student travels to the world of 'House of the Dragon' and tries to understand their magic.
One common theme is power and its consequences. The female blue eyes white dragon is often a very powerful entity, and fanfictions might explore how she deals with that power, whether she uses it for good or is tempted by its darker aspects.