Well, first of all, Harry's magic is very structured. There are rules and spells and a whole system in the wizarding world. Luke's magic from Greek mythology is more fluid. It's based on the will of the gods and his own connection to his demigod heritage. When they come together, their different magics could clash at first. For example, Luke might not understand why Harry needs a wand to perform magic. But as they get to know each other better, they could start to blend their magics. Harry could use his precise spell - casting skills to direct Luke's more raw power. And Luke could teach Harry how to be more in tune with the natural elements of magic, like the power of the wind or the sea. This interaction could lead to some really cool and unique magical feats in the fanfiction.
Luke's magic from Greek mythology might be more elemental and based on the power of the gods. Harry's magic in the wizarding world is more about spells and potions. When they interact, Luke might be able to do things like control the weather in a way that amazes Harry. Harry, on the other hand, could use his spell - casting to create objects or illusions that Luke has never seen. Their different backgrounds could lead to a lot of learning and mutual admiration.
Harry Potter comes from a world where magic is often learned through formal education at Hogwarts. Venelana Bael might be from a more family - based magical heritage. So, when they interact, Harry could introduce her to the structured learning of magic, like the theory behind spells. In return, Venelana could show Harry how to tap into more instinctive and ancestral forms of magic. This could lead to new spells being created or modified as they combine their different magical knowledge.
One common theme is redemption. Since Luke has made some bad choices in the original lore, many fanfictions focus on him trying to make up for his mistakes.
One great Harry Potter Luke Castellan fanfiction is 'The Path of Luke Castellan' on FanFiction.net. It delves deep into his backstory and his relationship with the world of Harry Potter in a really interesting way.
One plot idea could be that Harry Potter and Luke Castellan somehow meet in a magical realm outside of their own stories. Maybe they are brought together by a powerful magic that needs their combined powers to defeat an ancient evil. Another idea is that Luke, with his knowledge of Greek mythology, helps Harry understand some of the more mysterious aspects of magic in the wizarding world that have roots in ancient myths.
If raised by Newt, Harry's ability to sense the emotions and needs of magical creatures would be enhanced. This is because Newt has a great understanding of these aspects. Harry might also develop unique magical abilities that are specific to interacting with the habitats of magical beasts, like being able to create or modify suitable environments for them with magic.
His magical education would likely be more hands - on. Dresden is often in the thick of things in his world, so Harry Potter would probably get real - world experience much earlier. Instead of just learning from textbooks in a classroom, he'd be out there facing actual magical threats and learning on the job.
His magical training would likely be more nature - oriented due to Artemis' influence. He might spend more time outdoors, learning magic that is related to the elements, like controlling the wind or water in ways that are connected to the moon's power. For example, he could learn spells that are more effective during a full moon. With Athena's influence, his training in spells would be more strategic. He wouldn't just learn how to cast a spell, but also when and where to use it for maximum effect, like a military strategist.
Harry's background as an orphan might make him extra determined to be a great father. He might overcompensate and be overly protective during the pregnancy. Padma's background in a more traditional wizarding family could mean she has different ideas about child - rearing. For instance, her family might have specific rituals for when the baby is born that Harry is not familiar with. This could cause some friction between them, but also an opportunity for them to learn from each other.
They could also have a connection to his emotions. In fanfiction, perhaps when Harry is feeling angry, the tattoos might darken or become more prominent. When he is happy, they could shine brightly. This connection between his emotions and the tattoos could be a way for him to better understand himself and also for others around him to gauge his mood without him having to say a word. And the tattoos could potentially attract certain magical energies based on his emotional state, further affecting his magic.
In many fanfictions, Percy's powers might be explored in new ways in relation to Luke. For example, how his control over water could be used to counter Luke's actions. Luke may be given different abilities or backstories that make him more of a three - dimensional character. He could be shown as having been influenced by external forces that made him turn bad, rather than just being a 'born villain' as some might view him in the original. This changes how the two characters interact and how the story unfolds.