One idea could be that Naruto discovers a hidden power within himself that is related to God Slayer Magic. This new power could change the way he battles enemies in the Naruto universe. For example, he might be able to use it against powerful foes like Madara or Kaguya, giving him an edge he didn't have before.
In a Naruto learns God Slayer magic fanfiction, it could be really exciting. Naruto's already powerful ninja skills combined with God Slayer magic would make him an even more formidable force. He could use the magic in battles against tough enemies like Akatsuki members. Maybe he'd learn it from a mysterious character who travels between different dimensions, and this new power would give him an edge in protecting the Hidden Leaf Village.
One way Naruto could learn God Slayer magic in fanfiction is through a magical artifact. He might stumble upon an ancient relic during one of his missions that imparts the knowledge of God Slayer magic. Another possibility is that he meets a powerful mage who decides to teach him the magic in exchange for a favor, like helping to protect the mage's homeland.
The God Slayer Magic might change Naruto's view of power. He has always been focused on his ninja way and his goal to become Hokage. But with this new magic, he would have to reevaluate what power means and how to use it responsibly. He might start to see that there are different forms of power beyond just ninjutsu and chakra. This could lead to a more complex and mature Naruto in the fanfiction.
Naruto would likely be one of the main characters. He's the protagonist in the original Naruto series, so it's probable that he'd play a major role in this fanfic as well, especially when it comes to adapting to the god slayer magic.
One idea could be an OC who discovers their God Slayer magic in a dangerous situation at the high school. For example, a sudden attack by a stray devil forces the OC to tap into this unknown power within them to protect their friends. This could lead to a whole new arc in the fanfiction where the OC has to learn to control and master the God Slayer magic while also dealing with the regular high school DxD drama like relationships and rivalries.
One interesting concept could be the combination of Naruto's world with god - slayer magic. It might introduce new power dynamics and character developments. For example, Naruto characters could gain the ability to slay gods, which would completely change the power scale in the Naruto universe.
One possible plot could be that Natsu discovers his new power as a war god slayer magic user. He then has to face a series of powerful enemies who are threatening the world. Along the way, he might meet new allies who also have unique magic abilities. As he battles these foes, he gradually masters his war god slayer magic and becomes a more powerful wizard.
First, you need to define the origin of the God Slayer magic. Is it something passed down through generations, or did the OC obtain it through a special event? For example, it could be a gift from a mysterious being. Then, consider how the magic affects the OC's personality. If it's a powerful and dangerous magic, they might be more cautious or have a sense of responsibility. Also, think about how it interacts with the existing powers in the High School DxD world. Will it make the OC a target? Will they have to hide it?
Hermione Granger could also be a great choice as the main character. She is extremely intelligent and studious. In a fanfiction with god - slayer magic, she could be the one to discover and decipher the secrets of this new form of magic. She might use her knowledge to not only master it but also to teach others and lead the fight against any god - related danger.