In a 'naruto controls darkness fanfiction', perhaps Naruto initially struggles with this new power. He's a hero associated with light and positive energy, so controlling darkness could be seen as a corruption. But then he realizes he can use it for good, like infiltrating dark organizations by blending in with their dark - themed jutsus.
In 'naruto controls the darkness' fanfiction, it could also be that Naruto is exposed to a dark energy source accidentally. This energy starts to influence his thoughts and actions in negative ways at first. But being Naruto, he doesn't give in. He uses his strong willpower and the positive relationships he has with his friends like Sasuke, Sakura, and others to find a way to control this new dark power. He might have to face some of his own demons from his past, like the loneliness he felt as a child or the times he failed to protect his friends, and use these experiences to better understand and control the darkness within him.
One possible plot twist could be that Naruto's control over light and darkness is initially seen as a great power, but it actually comes with a hidden curse. For example, every time he uses it too much, he starts to lose his memories related to his friends and his village. This would add a great deal of internal conflict for Naruto as he has to balance using his power to protect those he loves while also not losing his connection to them.
It could be an ancient evil that has been lurking in the shadows for ages. Maybe a dark spirit that was sealed away long ago and is now breaking free, and Naruto has to control the darkness within himself to fight it.
A powerful dark spirit might be the main antagonist. This spirit could sense Naruto's new ability to control darkness and see him as a threat. So it starts causing chaos in the ninja world, forcing Naruto to use his dark - controlling powers to stop it. The spirit could have the ability to possess other ninjas, making them do its bidding.
One idea could be that Naruto discovers a strange new chakra within the headcrabs. He then figures out how to manipulate this chakra to control their actions. He might train them to perform tasks like scouting or even to help in rebuilding damaged villages by using their physical strength.
Well, in this kind of fanfiction, Naruto might use his powerful jutsu to influence political situations across the ninja world. He could impose his ideas of peace on all the hidden villages, uniting them under his leadership through sheer force and charisma.
In this fanfiction, Naruto's ability to control shadows could be related to his connection with the Nine - Tails. Maybe the power of the Nine - Tails unlocks this new ability within him. He could use the shadows to form shields against attacks, or even to travel quickly from one place to another by using the shadows as a sort of transportation network within the ninja world.
Well, it could be about Naruto using his chakra to control paper in unique ways. Maybe he creates paper constructs for battle or uses it to send secret messages.
One possibility could be that Naruto discovers a new jutsu that allows him to control inanimate objects like vacuums. He could use this power to clean up after battles or even as a new form of defense. For example, he might make the vacuums suck up incoming attacks or use them to disorient opponents by creating a whirlwind of debris.
Well, in a Naruto controls glass fanfiction, perhaps Naruto's power over glass is related to a new form of chakra. He might start off not knowing how to control it well. So, he has to train with someone like Kakashi. They could go to a special place filled with glass - like structures. There, Naruto learns to manipulate the glass in different ways, like making glass clones that can confuse his enemies. And as he gets better, he uses this power to protect his village from a new threat that is immune to normal attacks but vulnerable to glass - based ones.