Naruto might be able to create cloud - based illusions. Just as he can create shadow clones, with the power of Cloud sealed in him, he could project illusions made of clouds to deceive his opponents. These illusions could be large - scale and very realistic, confusing enemies about his true location and intentions.
He could gain the power of manipulation. Gaster might give Naruto the ability to manipulate space or time on a small scale. Maybe he could create small portals or slow down time for a short period during combat.
He might gain Minato's teleportation jutsu. It was one of Minato's signature moves, and with Minato sealed in him, Naruto could potentially access and learn this powerful technique.
Well, if Cloud is sealed in Naruto in fanfiction, it could greatly enhance Naruto's power. Maybe he could control new types of jutsus related to cloud elements, like cloud - based attacks or defenses. This would make him even more formidable against his enemies.
He could gain the ability to use a sword more effectively. Cloud is a master swordsman, and Naruto, under his tutelage, might learn some amazing sword - fighting techniques. Also, Cloud has some superhuman strength and speed, and Naruto could potentially inherit or be trained to have similar enhanced physical abilities.
Naruto could have the power of solar - powered regeneration. The sun is often associated with life and renewal. So, if he gets injured, his wounds could heal faster with the energy of the sun. He may also be able to use the sun's energy to enhance his physical strength. He could run faster, jump higher, and hit harder as if he was charged up by the sun's power.
His abilities would change in multiple ways. Firstly, his chakra control might be affected. Since Godzilla is a massive and powerful entity, it could disrupt Naruto's normal chakra flow. However, he could also learn to harness Godzilla's power within him. For example, he might be able to use Godzilla's raw strength to enhance his Sage Mode or even his Nine - Tails transformation. This could make him an even more formidable opponent. His speed could also be enhanced as Godzilla's power might give him a boost in his physical capabilities, allowing him to move faster and react quicker in battle.
Maybe it's an ice - dragon. This would be an interesting contrast to Naruto's usual warm - hearted personality. The ice - dragon's power could be used in creative ways in battles, like freezing opponents or creating ice - based defenses.
He might gain the ability to use his parents' chakra more directly. For example, if his father was good at a certain type of jutsu, Naruto could potentially access that more easily. Maybe some kind of enhanced speed or strength that was unique to his father.
He could gain the ability to freeze Grimm. In RWBY, silver eyes have the power to harm and sometimes even stop Grimm in their tracks. Naruto's already impressive combat skills combined with this would make him a formidable force. He might also gain enhanced vision, like being able to see in the dark better or detect hidden threats more easily.
He could gain the ability to absorb chakra on a much larger scale. With his greedy nature, he might use this to hoard chakra from others, making himself super - powerful. He could also gain the power to control the six paths, which he might use to dominate others rather than for the common good.