Well, for starters, the magic of Old Valyria was often associated with dragons and powerful spells. In Harry Potter fanfiction, this could mean that Hogwarts students might study Valyrian magic alongside their regular curriculum. For example, a new class could be introduced that focuses on the ancient Valyrian spells.
One great example could be a story where a wizard from the Harry Potter world discovers ancient Valyrian magic spells. This could lead to all sorts of interesting plot twists, like using the powerful Valyrian magic to combat dark wizards in the Harry Potter universe. Another could be a crossover where a character from the Valyrian era is transported to Hogwarts and has to adapt to the different magical system there.
I really like 'Fem Harry Potter's Adventure in Valyria'. It starts with her accidentally being transported to Valyria. There, she discovers new forms of magic that she has to quickly learn to adapt. The story does a great job of blending the lore of Harry Potter with the rich and mysterious world of Valyria. The fem Harry Potter's character development is also well - written as she grows from being a bit lost in this new world to becoming a key figure in it.
The contrast. Harry Potter is from a very different magical world than Valyria. So when you have a fem Harry Potter in Valyria, it's like putting a fish out of water in a new and exciting pond. Her different values and skills from the original Harry Potter series clash and blend with the Valyrian culture in interesting ways.
The Death Eaters could be one group of antagonists. They might see Harry's newfound power and position as the King of Valyria as a threat to their plans for wizarding world domination. So they try to stop him from fully realizing his potential in Valyria and bringing back any new magic or alliances that could defeat them.
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.
There might be a fanfiction where the dragons in Valyria are related to the dragons in the Harry Potter universe. For example, perhaps a spell from Harry Potter is used to control a Valyrian dragon, leading to all sorts of adventures and challenges for the characters.
Some dedicated Harry Potter fanfiction blogs might also be a good source. These blogs sometimes feature lesser - known fanfictions, and if you're lucky, you might stumble upon some great 'Harry Potter Valyria' fanfictions that haven't been widely discovered yet.
Maybe to seek answers. The secrets of his parentage might be somehow linked to Old Valyria. He could believe that going there would give him a better understanding of who he really is and his place in the world.
The Old Valyria story is one of great power and mystery. Valyria was a once - mighty civilization. It was known for its dragonlords who ruled the skies with their fearsome dragons. Their magic was strong, and they built grand structures. But then, a cataclysmic event, likely a volcanic eruption of some sort, led to its downfall, and the once - great Valyria was destroyed, scattering the survivors and their knowledge across the known world.