If Percy Jackson were to build a lightsaber in the fanfiction, it would be a wild combination of two different fictional universes. He might start by going on a quest to find the right materials. Since he has experience with mythical creatures and places, he could search in some hidden corners of his world. Once he has all the parts, he would need to figure out how to make them work together. His skills in combat and his ability to adapt quickly would come in handy. He might also have some interesting encounters with Jedi - like figures or dark side entities in his dreams or during his adventures, which could give him more inspiration on how to build and use the lightsaber.
In the fanfiction, Percy Jackson might build a lightsaber in a rather unorthodox way. He could call on his friends from Camp Half - Blood for help. Annabeth could use her wisdom to figure out the technical aspects of the lightsaber, like how to power it up. And Percy, with his connection to the elements, could find a way to make the hilt more attuned to his own powers, maybe infusing it with some water - based magic.
Well, in this fanfiction, perhaps Percy could use his water - bending abilities to shape the kyber crystal. He might draw on his demigod skills to assemble the various parts of the lightsaber with precision. After all, he's used to handling weapons like Riptide, so adapting to building a lightsaber could be an interesting journey.
Well, in such a fanfiction, Naruto might use his chakra in a unique way to power the lightsaber. Maybe he'd combine his ninja skills with the new weapon. For example, he could use his speed to make quick slashes with the lightsaber, like his fast kunai attacks.
Well, he might find it in some mysterious place like an ancient temple. Maybe it was left there by a powerful being from another dimension.
Sasuke could be one to help. Given their history and Sasuke's intelligence, he might contribute some knowledge about energy manipulation which could be useful for the lightsaber's power source.
Well, perhaps Harry Potter discovers some ancient magic that allows him to combine the wizarding world's technology with that of the Star Wars universe. He might use his knowledge of spells to power the lightsaber in a unique way, like using the Lumos spell to create the blade instead of the traditional kyber crystal. He could then face off against Voldemort with this new weapon, creating a whole new dynamic in their battles.
If Naruto creates a lightsaber, it could be related to his connection with Kurama. Kurama's chakra is extremely powerful. It's possible that this chakra could be harnessed in a way that can mimic the energy source of a lightsaber. Naruto, being the creative and adaptable ninja he is, would then figure out how to shape and control this new form of energy into a blade, much like a lightsaber. And he would surely use it to protect his friends and the Hidden Leaf Village.
Well, Percy could use his water powers to put out any fires or floods that the Avengers might be facing. His ability to control water could also be used to create barriers against enemies. For example, if the Avengers were up against a powerful fire - based villain, Percy could summon a huge wave to douse the flames and save the day.
Well, it could happen if Percy has an encounter with a dragon that changes his perspective. Maybe he meets a dragon that has some sort of connection to the Greek gods. For example, the dragon could be a guardian of a hidden artifact related to Poseidon. This encounter makes Percy intrigued by dragons, and he starts to study them, thus becoming a dragon fan.
Well, it could happen if Percy somehow got exposed to Batman comics or movies in the demigod world. Maybe Annabeth introduced him to it, thinking it would be a good strategic read. After all, Batman is known for his brilliant mind and strategic planning, skills that could be useful for Percy in his own battles.
Well, it could happen if Percy somehow gets exposed to the Star Wars universe. Maybe he stumbles upon a holo - projection of a Mandalorian in action while on one of his quests. The honor - bound code of the Mandalorians might appeal to Percy, who has his own strong sense of loyalty and justice.
In the fanfiction world, the author could also give Percy some new powers or abilities specifically for this encounter. For example, he could have the power to nullify magic for a short time. This would be a huge advantage against Voldemort. Percy could then use his physical combat skills to overpower Voldemort and deliver the final blow. Another aspect could be that Percy's friends from Camp Half - Blood could help him in some way, like providing distractions while he goes in for the kill.