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 is that the lions are actually magical guardians in disguise. They raise Harry because they sense his great destiny. As Harry grows up with them, he learns survival skills and how to face challenges head - on. When he finally enters the wizarding world, he has a unique advantage over other wizards because of his upbringing. He might also have the ability to communicate with lions and other big cats in a way that no one else can.
Obviously, Harry Potter would be one of the main characters. Then, the King of Lions himself could be a central character. He could be a majestic and wise being with his own backstory and motives. Hermione and Ron could also be important characters. Hermione might be intrigued by the new form of magic in the lion realm and Ron could be there for support and comic relief, as he often is in the original series.
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'.
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 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.
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.
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.
Maybe Harry discovers he has some hidden connection to Atlantis. He could be magically transported there and due to his powerful magic and heroic nature, he ends up becoming the king. He then has to deal with Atlantis's internal politics and protect it from external threats.