Yan Bingyun had been captured by Northern Qi and imprisoned in the water prison in " Celebrating Years ". In the negotiations between Northern Qi and the Qing Kingdom, the Qing court had sent Si Lili and Xiao En to exchange hostages with Northern Qi in order to save Yan Bingyun. In the end, Fan Xian successfully rescued Yan Bingyun and made him his think tank.
Si Lili's imprisonment in the water prison was one of the plots in the drama series " Celebrating Years." Si Lili was imprisoned in the water prison and had a conversation with Fan Xian there. However, the specific content of the conversation was not described in detail in the search results. Therefore, the search results did not provide a clear answer as to what happened after Si Lili was taken into the water prison.
Jiraiya could be one. Although he is known more for his fire and earth - based jutsu, he has vast knowledge and could guide Naruto in using water affinity in unique ways. Another could be Kisame. He is a master of water jutsu. His skills with water manipulation are top - notch, and he could teach Naruto some really powerful and advanced water techniques.
One cool jutsu could be the Water Spiral. Naruto would spin water around his body at a high speed, creating a protective and offensive spiral. Another could be the Water Mirror Clone. He creates clones made of water that can reflect attacks back at the enemy. And there's the possibility of the Water Tsunami, where he summons a huge wave of water to overwhelm his foes.
The Water Dragon Jutsu could be modified to carry other elements within it. For example, the user could infuse lightning chakra into the water dragon. So when the dragon attacks, it not only hits with the force of water but also delivers electric shocks. This would be a great new battle strategy as it combines two different elements for a more powerful and unexpected attack.
Maybe in the fanfiction, the Water Dragon Jutsu has been corrupted by an evil force. Naruto and his friends have to find a way to purify it. They might need to travel to an ancient water temple where they face various trials and battles with dark water creatures that were created due to the jutsu's corruption.
A 'Solar - Flare Rasengan'. Naruto could combine his wind - style chakra with some kind of solar - based energy he discovers. This jutsu would be like a super - charged Rasengan that emits a blinding light as well as powerful wind - based damage.
There could be a jutsu that allows for instant teleportation across long distances. This jutsu might be a new discovery in the fanfiction world, perhaps created by a character who has been experimenting with space - time ninjutsu. They might use it to quickly get in and out of battles or reach far - off places in a blink.
It could be a new form of Rasengan. Maybe Naruto discovers a way to combine different elements with the Rasengan more effectively, like adding lightning to it for a more powerful and faster attack.
There's also the 'Inferno Storm Jutsu' in some fanfictions. It creates a large - scale storm made entirely of fire. The fire in this storm has different intensities, with the center being the hottest and most destructive. It can cover a large area, making it a great offensive move against groups of enemies.