If Percy is an editor or moderator, he could exercise control by setting rules for ice fanfiction. For example, he could say that all ice - based magic has to follow a certain set of guidelines. He can also accept or reject submissions based on how well they incorporate ice elements according to his standards.
In some fanfictions, Percy might discover his ice - controlling ability during a life - threatening situation. For example, he could be in a battle against a powerful fire - using enemy, and in a moment of desperation, he unknowingly taps into the power to control ice to counter the heat.
It might also imply that Percy, outside of the fanfiction as a creator or a moderator, has control over the ice fanfiction. He could decide which stories get published, what kind of ice - related concepts are acceptable in the fanfiction community he oversees. This would give him a lot of power in shaping the ice fanfiction genre within that particular context.
Well, in some fanfictions, Percy might control ice through a new power bestowed upon him by some mysterious god or entity. Maybe he discovers he has the ability during a quest when he's in a really cold and magical place.
It could be through some kind of inheritance. Perhaps he has some long - lost family connection that gives him this unique power. In the fanfiction, he might start noticing strange things happening around cold or icy elements, and then gradually realize that he can actually control them.
The environment could also pose a challenge. If he's in a really hot place, using his ice - controlling ability might be much more difficult as the heat could quickly melt the ice he creates. Also, if he's in a place with very little water vapor in the air, it would be hard to form ice in the first place, which limits his power usage.
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.
Some fanfictions might suggest that Percy's control over blood is a new power he discovers while on a special quest. He might find out that his powers are not just limited to water bodies but can also extend to the fluids within living beings. He could start to experiment with this new - found ability, and at first, it might be a bit clumsy. But as he gets more practice, he could use it for various things, like healing (by manipulating the blood's flow to injured areas) or even in combat (by making an opponent's blood act in a way that disables them, like making it rush to their head and cause dizziness).
Percy often outsmarts his opponents. In the fanfiction, he might use his knowledge of his powers and the environment to his advantage against Jason. He could lead Jason into a situation where his wind powers are less effective, like in a closed - in space filled with water. Then, Percy could easily use his water powers to subdue Jason.
Well, it could enhance his combat skills significantly. He could use ice to create barriers for defense, like forming thick ice walls to block enemy attacks. Also, he could make ice weapons such as ice shurikens or ice swords to attack from a distance or in close - quarters combat.
Well, in some fanfictions, it might be related to his demigod powers. Since he has a connection to the water element, blood being a liquid could potentially be manipulated in a way similar to how he controls water. Maybe he can sense the water content in blood and use his will to move or influence it.