Well, Naruto's chakra control would have to adapt. In the Dying Light world, he might use his chakra to enhance his weapons, like making a kunai cut through the tough zombie hides more easily. His Rasengan could also be modified. Instead of just being a powerful close - range attack, he could potentially throw it like a grenade in the Dying Light environment, causing a lot of damage to groups of zombies. And his sensing ability, which he uses to detect enemies in his own world, could be used to sense the approaching zombie hordes from a distance.
In a Naruto Dying Light fanfiction, a cool plot could be that Naruto's chakra has an unexpected effect on the virus in the Dying Light world. Maybe his positive chakra energy starts to slowly purify the infected areas. Also, there could be a story where Naruto has to face off against a powerful zombie - like enemy that has some of the abilities of the ninja he's faced in his own world, like being able to use genjutsu - like illusions on the survivors.
Well, in a Naruto and Dying Light fanfiction, there are so many possibilities. Naruto's chakra could be a unique element in the Dying Light world. He could use it to power up makeshift weapons or to heal the injured survivors. Also, the idea of Naruto facing off against the powerful volatiles in Dying Light is exciting. His shadow clone jutsu could be used to distract the zombies while he makes a strategic move. And his positive attitude would surely boost the morale of the survivors in that dark and dangerous world.
In fanfiction, Naruto would likely bring his sense of justice to the Dying Light world. He'd see the plight of the survivors and decide to fight for them. His ability to sense danger with his ninja senses would be very useful in the zombie - filled environment. He could also use his transformation jutsu to blend in with the zombies if needed, and then surprise them with his attacks.
I'm not entirely sure if there is a specific 'Naruto Sings Time of Dying' fanfiction. Fanfictions cover a wide range of scenarios and ideas. It could be that such a unique concept exists, but it might also be a very niche or even new idea that hasn't been written yet. You could also try reaching out to Naruto fan communities on social media platforms to ask if anyone has come across such a fanfiction.
It can have a big impact. Some fans might be really sad because Naruto is such a beloved character. It can also inspire new fanarts and discussions within the fandom.
One possibility could be that Naruto has been poisoned by a new and unknown enemy. This poison is slowly eating away at his life force, and he's trying to hide it from his friends and family so as not to worry them. He might be secretly seeking a cure while still fulfilling his duties as Hokage.
It could be a rogue shinobi from Naruto's past who has been biding his time. This shinobi might have developed a new jutsu specifically designed to target Naruto and make him die slowly. He's doing it secretly to cause chaos in the Hidden Leaf when their hero suddenly passes away.
The people closest to Naruto, like Hinata, would be completely devastated. She would be by his side, crying and feeling like her world is falling apart. The thought of losing Naruto, the man she loves, would be almost too much to bear.
One popular 'naruto dying fanfiction' is 'The End of the Orange Hokage'. It shows Naruto sacrificing himself to save the village from a powerful new threat. Another is 'Naruto's Final Stand' where he faces an illness that slowly takes his life while still trying to protect his loved ones.