Perhaps Harry is part of a secret society within the wizarding world that values both mage and warrior qualities. He is sent on a quest where he has to rely on his magic to solve puzzles and his warrior strength to face dangerous creatures. His journey could lead him to discover a new type of magic that can only be accessed by those with a warrior's spirit.
A plot could involve Harry being trained in an ancient art that combines mage and warrior techniques. He then has to use these skills to protect Hogwarts from a new threat that is immune to normal magic. He might have to physically fight and use magic at the same time, like creating magical shields while engaging in hand - to - hand combat.
One idea could be the warrior aspect making Harry a more battle - hardened and strategic fighter. Maybe he trains in a secret ancient magic that combines the wizarding and warrior skills, allowing him to face Voldemort's forces in a completely new way.
One idea could be the Holy Warrior having unique magical abilities that are different from the regular magic in the Harry Potter world. For example, they might be able to purify dark magic on a large scale.
Perhaps a story where a battle mage is actually an undercover agent from a rival magical school. They are sent to Hogwarts to steal some powerful magic artifacts but end up having a change of heart. They might start to see the good in Hogwarts and its students and have to fight against their original mission.
Maybe there could be a plot where an ancient evil threatens the wizarding world, and only an elemental mage can stop it. The elemental mage has to go on a quest to master all elements fully. They start with their native element, say water, and as they journey, they meet different characters from the Harry Potter series who help or hinder their progress in learning to control earth, air, and fire as well.
One idea could be a mage who can communicate with dragons and uses this ability to help Harry Potter in a secret mission. For example, the mage could get the dragons to guard Hogwarts during a big attack.
A possible plot could be that Voldemort also finds his way into the Spartan world. Harry then has to form an alliance with the Spartans to fight against Voldemort. The Spartans, with their combat skills, and Harry, with his magic, combine forces. Harry might teach some of the Spartans basic defensive spells to protect their city - state from Voldemort's dark magic attacks.
One plot idea could be that the Gun Mage is a new student at Hogwarts. They have to hide their gun - based magic from the teachers at first because it's so different from traditional magic. Eventually, they use their unique skills to help Harry Potter and his friends in a battle against a new dark force. For example, the Gun Mage's ability to quickly fire concentrated magic blasts could be useful in fending off hordes of dark creatures.
A story where the Warrior Princess is actually a long - lost heir to a powerful magical family in the Harry Potter universe. She discovers her heritage while at Hogwarts and has to balance her newfound magical powers with her existing warrior skills. She could form an unlikely alliance with some of the main characters to fight against a dark force that is interested in her unique combination of powers.
One idea could be to have a wizard from the Harry Potter world time - travel back to the era of ancient warriors. They could use their magic to aid or disrupt the battles of the ancient warriors, creating a whole new dynamic in the historical events. For example, a wizard could help an outnumbered group of ancient warriors by using magic to create illusions to confuse their enemies.
The combination of different magical concepts. In the original Harry Potter series, we mainly see traditional wizards. But in 'harry potter warrior mage fanfiction', the idea of a warrior mage brings a new dimension. It combines physical combat skills with magic, which makes for more dynamic and action - packed stories.