Combine different magic systems. For example, if crossing with the Magicians world, mix the Hogwarts magic with Brakebills' magic. The champions could struggle to adapt to new spells and incantations. Another way is to change the nature of the tasks. Instead of the usual tasks, make them more like a detective mystery where the champions have to solve a magical crime to progress in the tournament.
Introduce new characters from the crossover world that disrupt the normal flow of the Triwizard Tournament. Say in a crossover with the Supernatural world, the Winchester brothers show up. They might think the Triwizard Tournament is some sort of dark magic ritual and try to stop it. This creates a whole new dynamic and conflict. You can also play with the time and space aspects. If it's a crossover with Doctor Strange, he could manipulate the time and space of the tournament tasks, making them more complex and unpredictable.
Start with a character from an unexpected universe getting invited to the Tournament of Power. For instance, a character from a fantasy world where magic is the main power source. Then, as they enter, they face challenges not only in the battles but also in understanding the technology and different power systems in the Tournament of Power world.
One idea could be to cross it with the world of Narnia. Imagine the Triwizard champions having to face challenges in the magical land of Narnia. They might have to deal with the White Witch's minions or find their way through the enchanted forest. Another idea is a crossover with the Percy Jackson universe. The demigods could participate in the Triwizard Tournament, bringing their unique powers and abilities. For example, a son of Poseidon might use his water - controlling powers in a water - based task.
A wizard from a far - off land, like a wizard from a hidden tribe in the Amazon rainforest. He or she could bring a completely different style of magic that the Hogwarts students and other champions have never seen. Their magic could be more nature - based, using the power of the rainforest plants and animals. This would make their approach to the Triwizard tasks very different and exciting.
You can start by thinking about different magical cultures. For example, if you have a character from Durmstrang, you can give them a more Slavic - influenced magical style. Maybe they have a special spell - casting method using runes. For a Beauxbatons character, they could be very elegant in their magic, with spells that are like works of art. Another way is to combine different magical abilities. A character could be part - Veela and have the ability to charm people without really meaning to, which adds an interesting layer to their personality in the Triwizard context.
One possibility could be that Harry discovers some dark magic or a hidden conspiracy within the Triwizard Tournament that forces him to take extreme measures and destroy it. Maybe he finds out that the tournament is being used as a cover for an evil plot against Hogwarts or the wizarding world in general.
One possible scenario in this fanfiction could be that Harry and Fleur form an unexpected alliance during the Triwizard Tournament tasks. They might discover they have complementary skills, like Harry's courage and Fleur's elegance and magic related to water (since she's from Beauxbatons). This alliance could lead to them facing the challenges in a new and interesting way, perhaps with Fleur using her Veela charm in a creative manner to distract the obstacles while Harry uses his Gryffindor bravery to take on the more physical parts of the tasks.
There are fanfictions where Hermione and Fleur become friends during the Triwizard Tournament. In some stories, they start to see past their initial rivalries. Fleur might initially see Hermione as just a book - smart girl, but as they face the challenges of the tournament together, they develop a mutual respect. Maybe they work together on the Yule Ball preparations within the context of the tournament, which helps to strengthen their bond.
One great fanfiction could be where Harry and Luna team up in a unique way during the Triwizard Tournament tasks. Maybe Luna uses her off - beat magical knowledge to help Harry solve the puzzles in the maze. For example, she might recognize some magical creatures that Harry is unfamiliar with and guide him through.
In a fanfiction, Draco could be chosen as an unwilling participant in the Triwizard Tournament. Maybe the Goblet of Fire was tampered with by some dark forces who thought Draco would be an easy puppet. As he goes through the tasks, he starts to show unexpected courage and loyalty, much to everyone's surprise.
One possible fanfiction could be about Harry and Hermione teaming up secretly during the Triwizard Tournament tasks. They might use their combined knowledge and skills to outwit the other competitors. For example, in the maze task, they could have a special code to communicate and find their way to the Triwizard Cup faster than anyone else.