One exciting moment could be when Natsu first unleashes a new and powerful attack against Zeref. Maybe it's a combination of his dragon slayer magic and some newfound strength he has gained. Another exciting part might be when Zeref counters with a really dangerous and dark spell that Natsu has to struggle to avoid. And of course, the moment when the Fairy Tail members react with shock or excitement to these powerful exchanges between the two would also be thrilling.
In this fanfiction scenario, one possible thing that could happen is that Natsu's determination to defeat Zeref might be put to the ultimate test. Natsu has always been a fighter with a strong will, and facing Zeref, he would have to dig deep. Zeref, on the other hand, being extremely powerful, might initially have the upper hand. But Natsu could tap into some hidden power, perhaps related to his dragon slayer magic in a new and unexpected way. Maybe he would get some kind of emotional boost from his friends in Fairy Tail who are watching, which gives him the edge he needs to turn the battle around.
In some fanfictions, Zeref is portrayed as a more sympathetic character. Instead of just being the big bad, he might be shown as a victim of his own power or circumstances. For example, he could be a character who was forced into doing evil things and actually has a good heart deep down.
One possibility is that Naruto, with his determination, could adapt Zeref's powers in a unique way. Maybe he'd use Zeref - like magic to enhance his ninjutsu. For example, he could infuse Zeref's death - based magic into his Rasengan, creating a more powerful and dangerous attack. Another aspect could be Naruto's personality change. If he becomes influenced by Zeref, he might become more brooding and less of the cheerful ninja we know. However, his core values of friendship and protecting the village would still likely be there, just warped a bit by Zeref's dark nature.
Yes, there are likely some fanfictions out there with this concept. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'Naruto Brother of Zeref' in their search bars and see what comes up.
One common theme is redemption. Many fanfictions explore the idea of Zeref being redeemed through his interaction with the female character. For example, the female might show him kindness or love that he has never experienced before, leading him to question his evil ways.
Well, it's quite possible. Fanfiction writers often come up with the most creative and unexpected crossovers. Since Naruto, Mavis, and Zeref are from different fictional universes, a fanfiction combining them in such a way could be a really interesting read. However, you'll have to do some searching on the various fanfiction hubs to find it. Some of these stories might be quite rare, but if you dig deep enough, you may come across one.
One common theme is power struggle. Since Zeref is a very powerful character, when he crosses over into other universes, there is often a struggle for power with the existing powerful entities in those worlds. For example, in a crossover with a superhero universe, Zeref's dark magic might clash with the superpowers of the heroes.
It's very possible. In the realm of fanfiction, all sorts of wild ideas are explored. Since both Naruto and Zeref come from different fictional settings, a fanfiction writer might have decided to blend the two. Maybe they saw some similarities in their characters' powers or personalities that led them to create a story where Naruto is Zeref's son. This could also open up a whole new set of plotlines, such as Naruto having to deal with his newfound heritage and the implications it has on his relationships in the Naruto universe.