One possible plot could be that the Yautja King somehow gets transported to the Harry Potter universe. Maybe he's initially seen as a threat but then forms an alliance with Harry and his friends against a common dark enemy, like Voldemort. The Yautja King could bring his unique combat skills and advanced technology to the fight.
In a 'Harry Potter Yautja King' fanfiction, the plot could involve a prophecy that ties the Yautja King to the fate of the wizarding world. The Yautja King, being a powerful and honorable being in his own right, feels compelled to help. Along the way, he has to deal with the prejudices of the wizards who are afraid of his alien nature, but he gradually wins them over with his acts of heroism and his unwavering sense of justice.
Well, perhaps the Yautja is on a hunt in its own world but gets caught in a magical portal that leads it to Hogwarts. The students are both scared and intrigued. Hermione starts researching about it, trying to find a way to send it back. Meanwhile, the Yautja sees the Death Eaters as worthy prey and starts stalking them. Harry has to convince the Yautja not to go on a full - out killing spree which might endanger innocent lives as well.
In this fanfiction, it could be that the king is from an ancient line of wizards that have long been in hiding. When he adopts Harry, he reveals to Harry the true history of magic, which has been distorted over time. Harry then uses this knowledge to find new and powerful magical artifacts that help him defeat Voldemort once and for all. The king also provides Harry with a new family and a sense of belonging that he never really had at the Dursleys'.
In a 'Harry Potter King of Lions' fanfiction, a great plot could be that the lions are guardians of a powerful magic that can only be accessed by someone with a pure heart like Harry. The King of Lions tasks Harry with a series of trials. These trials are not only physical but also test his moral compass. For example, he has to choose between saving a group of innocent magical creatures or obtaining a magic item that could give him an edge in the fight against Voldemort. Through this journey, Harry grows in his understanding of magic and his own self - worth.
One possible plot could be Harry Potter discovers he has some ancient connection to Valyria. Maybe he finds a hidden portal in Hogwarts that leads to the remnants of Valyria. There he could learn ancient magic that gives him new powers and he has to use these powers to fight off dark forces that are threatening both the wizarding world of Harry Potter and the remaining magic in Valyria.
One possible interesting plot could be Harry forming an unexpected alliance with the spiders. Maybe he discovers a way to communicate with them on a deeper level and uses their knowledge of the Forbidden Forest to his advantage in a battle against the dark forces. For example, the spiders could lead him to a hidden magical artifact that has the power to defeat Voldemort.
Another concept could be a Yautja attending Hogwarts. Imagine how the other students would react to this fearsome alien hunter in their midst. The Yautja would have to adapt to the school's rules and the magical curriculum, while also dealing with any potential threats or challenges from the wizarding world.
The Hogwarts professors would have mixed reactions. Dumbledore would be very diplomatic and open - minded. He would try to establish communication and see how the Yautja King could fit into the grand scheme of things in the wizarding world. Snape might be more suspicious and view the Yautja King as a potential threat to the safety and secrecy of the wizarding world. But as the Yautja King proves himself, Snape's opinion might change. And the students would be mostly in awe and a bit scared at first, but then some of them would be eager to interact with this strange and powerful being.
Well, perhaps in this fanfic, Harry Potter discovers some long - lost connection to Russia. Maybe he's the heir to a powerful Russian wizarding family. He could use his magic in a unique way influenced by Russian magic traditions, like using spells related to Russian folklore creatures.
Perhaps in this fanfiction, Harry Potter becomes the King of Gringotts due to some prophecy or a special gift he has. As the king, he could start to reform the goblin - wizard relations. He might introduce new policies in Gringotts that benefit both wizards and goblins, which would lead to a whole new set of adventures and challenges as he tries to balance the different interests.
One possible plot could be that Harry Potter, through some magical accident or powerful spell, is transported to Westeros. He might use his magical abilities to quickly rise in power, perhaps by impressing the local lords with his feats of magic. He could then set out to unite the kingdoms under his rule, using a combination of wizardry and political savvy that he learned from his time at Hogwarts and in the wizarding world.