Well, in such a fanfiction, the world - building would be amazing. Picture a scenario where the White Mage magic system from some other source is introduced to the Naruto and Fairy Tail universes. The Naruto characters might learn about the different types of magic in Fairy Tail and the White Mage's special techniques. For example, Naruto could learn to combine his chakra with White Mage spells and Fairy Tail magic for a super - powerful attack. It would be a story full of adventure, discovery, and new friendships between characters from different worlds.
A fanfiction with Naruto, White Mage, and Fairy Tail would likely involve a complex plot. The White Mage element could bring a new dimension of healing and support to the action - packed worlds of Naruto and Fairy Tail. Characters from all three would interact in interesting ways. For instance, the Fairy Tail members might be initially skeptical of the Naruto characters' strange powers, but as they see the White Mage - like abilities at work, they start to cooperate. And the Naruto characters would have to adapt to the Fairy Tail guild's rowdy and friendly environment while also dealing with the new magic system brought by the White Mage concept. It could be a story that explores themes of cooperation, cultural exchange (in terms of different fictional cultures), and the power of combining different abilities.