One idea could be an OC with the power to control water in unique ways, like creating ice sculptures that can come to life. Another could be an OC who has the magic to communicate with mythical animals and use them as allies. Maybe an OC with magic that allows them to manipulate time on a small scale, like freezing time for a few seconds during a battle.
I highly recommend 'The Outcast Demigod'. This fanfiction features an OC who doesn't fit in at first. The author does a wonderful job of showing the OC's struggle to find their place among the other demigods. It has some really intense battle scenes and a lot of heart - warming moments as the OC forms friendships. The story also delves into the OC's backstory in a very interesting way, making it a great piece of fanfiction.
Maybe an ancient god or goddess who has been forgotten by most but still holds great power in magic. This deity could see potential in Percy and choose to teach him magic as a way to bring back some balance in the world. It could be a goddess of magic who was once a part of the pantheon but has since been overshadowed.
First, study the existing magic system in Percy Jackson. Make sure your OC's magic fits within the rules. For example, if most magic is related to the Greek gods, your OC's magic should have a connection too. Second, give your OC limitations. No one should be all - powerful. Maybe their magic drains them if they use it too much. Third, develop a backstory for how they got their magic. Were they born with it? Or did they get it through some sort of encounter?
Another ability could be 'Inventory Management'. The OC can access a virtual inventory like in a role - playing game. They can store items in it, and when needed, pull out useful things such as magical weapons or potions. It's like having a portable storage space that only they can access, which gives them an edge in battles and quests.
For beginners, 'A New Beginning at Camp Half - Blood' is a good choice. It has a simple yet engaging plot. The OC is easy to understand and relate to. The story doesn't have overly complicated mythological references that might confuse new readers. It focuses more on the OC's journey of discovery at the camp.
In a 'Percy Jackson and a OC love fanfiction', you could also use the element of sacrifice. Let's say the OC is in danger of being captured by a powerful enemy. Percy risks everything to save her. This act of selflessness makes the OC see Percy in a new light. On the other hand, the OC could also sacrifice something for Percy, like giving up a chance to go back to her old life in order to stay with him at Camp Half - Blood. These sacrifices deepen their connection and lead to a stronger, more loving relationship.
One great 'Percy Jackson Magic Fanfiction' is 'The Magic of Camp Half - Blood'. It adds new and exciting magical elements to the already rich world of Percy Jackson. The author creates unique magic spells and artifacts that the demigods interact with in really interesting ways.
Some fanfictions introduce new types of magic that are not in the original series. This new magic could work based on a character's emotions. When a demigod is angry, their magic might become more powerful and destructive. Or when they're in love, their magic could have a more healing and positive effect. It's all about how the fanfiction author wants to expand and re - imagine the concept of magic within the Percy Jackson world.
One great Percy Jackson and OC romance fanfiction is 'A New Beginning'. It has a really well - developed OC character who has a unique backstory. The relationship between Percy and the OC grows gradually and realistically, with lots of sweet moments.