Igneel could be one of the main dragons. Since he has a connection with Natsu in the original story, it would make sense for him to be among the dragons raising Natsu. Another could be Metalicana, as he is also a well - known dragon. Grandine might also be there, considering her importance in the Fairy Tail universe.
Perhaps the plot involves Natsu having to choose between the different ideologies of the dragons that raised him. Each dragon may have its own idea about how to interact with the human world or other magical beings. This could lead to internal conflicts within Natsu as he tries to decide which path to follow. He could also use the combined knowledge from the dragons to solve a big mystery or defeat a powerful enemy that threatens both the dragon and human worlds.
Well, in many fanfictions, it could be Igneel and another dragon like Metalicana. Igneel is Natsu's adoptive father in the original series, and Metalicana is Gajeel's dragon. Combining them in a fanfiction as Natsu's caretakers could lead to some really interesting character dynamics.
There could be some new dragon characters created specifically for this fanfiction. These dragons might have unique abilities and characteristics that are different from the known dragons in the original Fairy Tail series. And perhaps there are some wise old wizards or spirits in the fanfiction who guide Natsu in between his dragon - training sessions.
One interesting plotline could be Natsu's struggle to fit in with human society after being raised by dragons. He might have different values and ways of doing things that clash with humans.
The plot could involve Natsu being sent on a special journey by the dragons for his training. Along the way, he not only masters new skills but also discovers secrets about the dragons' past and their connection to the world. He may face challenges that test his loyalty to the dragons and his own beliefs as a wizard.
One interesting plot could be Natsu's struggle to balance the teachings of the two different dragons. For example, one dragon might focus on strength and the other on magic control, and Natsu has to figure out how to incorporate both into his fighting style.
They could be two well - known dragons from the original lore. Maybe Igneel, Natsu's father figure dragon, and another powerful dragon like Acnologia. However, in fanfiction, they could also be completely new dragons created by the author.
Eragon would probably have a different view on power. Since he was raised by dragons, he would see power as something to be respected and used sparingly, as dragons do. He may also be more fearless, as dragons are often seen as powerful and fear - inspiring creatures. His communication skills with dragons would be far superior, and he might struggle to communicate as effectively with humans.