Naruto might be able to transform matter into energy and vice versa. This would give him an incredible power source. He could convert the surrounding air into a powerful blast of energy, or take a blast of enemy energy and turn it into harmless matter, like water or sand.
Naruto could develop his water control abilities through intense meditation. By focusing his chakra and mind, he can better understand the nature of water. He may also study the movements of water in nature, such as how rivers flow and how water droplets form. This knowledge would then be applied to his jutsu, gradually improving his control.
He could potentially develop the power to heal any injury instantly. Since DNA controls the building and repair of the body, by manipulating it, Naruto might be able to direct cells to regenerate at an accelerated rate, similar to how some real - world organisms can regenerate lost limbs.
He could develop an enhanced sense of touch. For example, he could sense the vibrations in the ground when someone is approaching, just like how some real - world blind people can read by touching the raised dots on a Braille book.
Naruto would likely develop his chakra control better. The toads could teach him unique ways to manage his chakra, like using it in harmony with the natural energy around him. This would make his Rasengan and other jutsu more powerful.
His physical abilities would likely improve a great deal. Black Widow is a master of martial arts, so Naruto could become even more formidable in close - quarter combat. His agility and strength could be enhanced beyond what he achieved in the ninja world just through her training methods.
In this fanfiction, Naruto could potentially develop the ability to create dark energy constructs like Raven does. For example, he could form weapons out of this energy, giving him an extra edge in close - combat situations. He may also inherit Raven's power of flight, which would completely change his mobility in battles and how he approaches combat scenarios. Additionally, Naruto could gain the power to absorb and redistribute energy, which could be used to either heal himself or boost his attacks. This new set of abilities would not only make Naruto more powerful but also open up new storylines and character developments within the fanfiction.
Another ability Naruto could develop is enhanced stealth. Itachi is known for his stealth and ability to move undetected. During the three - year training, Itachi could teach Naruto how to move more quietly, hide his chakra signature better, and approach opponents without being noticed. This would give Naruto an edge in combat, especially when facing more powerful opponents where a surprise attack could be crucial.
He could develop some sort of psychic power that doesn't rely on chakra. This could be a power related to his willpower, allowing him to influence the minds of his opponents or sense their intentions from a distance.
Well, in some fanfictions, Naruto's wind - controlling ability might develop through intense training sessions. He could be pushed to his limits by a tough mentor, constantly trying new techniques and facing various challenges that force him to adapt and improve his wind - control.
Definitely Kakashi. He's already very intelligent and has a wide range of skills. Time control could be an addition to his arsenal, and he could use it in creative ways in battle or for teaching purposes. Also, Madara Uchiha could be a likely character. He was always seeking more power, and time control would be a very powerful ability for him to have in fanfiction.