The plot could be that Naruto signs the snake contract in a moment of desperation. For example, during a battle where the village is on the verge of destruction and all other options seem exhausted. After signing, he discovers that the snake contract gives him access to a hidden dimension filled with snake - like creatures and ancient knowledge. He has to train in this dimension to master the powers of the contract. But there are also other forces in this dimension that want to use Naruto for their own evil purposes. He then has to fight against these internal threats while also using his new - found snake powers to defend his village from external enemies.
The main antagonist could be an ancient snake spirit that was bound to the contract. This spirit might not like the idea of Naruto, a human, having control over the powers of the contract. So it tries to possess Naruto or drive him insane by constantly whispering dark thoughts and trying to make him use the snake powers for evil. It would be a battle of wills between Naruto and this malevolent spirit.
Sure. There could be a fanfiction with such a plot. Naruto is known for his ability to form unique bonds. If he were to sign a lion summoning contract, it would be interesting. The lions could have their own personalities and abilities. For example, they might be able to use fire - based attacks or have super - speed, which would add a new dimension to Naruto's fighting style.
Well, it could mean he gains new powers related to the monkeys. Maybe he can summon really powerful monkey-like creatures to help him in battles. For example, he might be able to call on monkeys with unique jutsu or abilities that normal summons don't have.
A great fanfiction concept could be centered around a group of rogue ninjas who steal the snake summoning contract. They use the summoned snakes for their evil deeds, causing chaos in the ninja world. A young, inexperienced ninja team is then tasked with retrieving the contract. Along the way, they learn about the history and power of the snake summonings, and they also face moral dilemmas when they realize some of the snakes are not as evil as they seem.
Well, Naruto might gain some unique abilities from the dog contract. For example, he could have enhanced senses like better smell or hearing. Maybe he'd be able to communicate with dogs more effectively and use them in battles in new and creative ways.
Well, in this fanfiction, Naruto might gain some unique powers. Maybe he could communicate with the fox in a special way, like having telepathic conversations. This could lead to him having an edge in battles as he could quickly call upon the fox's strength.
The dogs themselves would be very important characters. There could be a lead dog, like a wise and powerful alpha dog that Naruto forms a close connection with. Maybe Akamaru could also play a role, since he is a dog in the Naruto universe already and could be involved in some way with Naruto's new contract.
It could be Kakashi too. Kakashi is very experienced and observant. He might notice Naruto's confusion or struggle with the new contract and offer his insights. He could share some of his own experiences with summons to help Naruto figure things out.
First, focus on the snakes' characteristics. Make them more than just simple summons. For example, give them unique voices, habits, and even a hierarchy within their snake society. Second, create a strong plot. It could involve a mystery related to the origin of the contract or a power struggle over it. Third, develop your characters well. If it's a new character, show their growth as they interact with the snakes. For instance, they might start off being afraid but gradually become confident.