A powerful ice giant could be the antagonist. This ice giant could have a grudge against Percy for some past encounter and uses its ice - magic to freeze him. It wants to keep Percy out of the way while it tries to invade Camp Half - Blood or other places important to the demigods.
One idea could be that Percy is frozen in ice due to a powerful curse from an ancient enemy. His friends in Camp Half - Blood have to go on a quest to find a magical item that can break the curse. Maybe it's a rare flower that only blooms in a certain realm.
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.
In fanfiction, Percy Jackson being the 'God of Ice' is a creative and non - canonical interpretation. It could be a writer's unique take on the character, perhaps giving him ice - related powers and a new role within the fan - created narrative. It might involve him having control over ice, snow, and cold elements, different from his original abilities in the official Percy Jackson series.
There could be a fanfiction where a character with ice powers is actually an enemy in the Percy Jackson world. They are trying to freeze over all the water sources, which would be a huge threat to the demigods. Percy and his friends have to figure out how to stop this ice - powered foe. They might discover that the only way is to find a way to combine fire and water powers in a unique way, like using the heat from Hephaestus - forged weapons along with Percy's water control to melt the ice and defeat the enemy.
In a Percy Jackson - Frozen fanfiction, perhaps Annabeth could meet Anna. Annabeth would be impressed by Anna's determination and loyalty. They could go on an adventure in the Arendelle kingdom, with Annabeth using her strategic mind to solve problems that the Frozen world is facing, like a strange curse that is making the ice in the kingdom melt uncontrollably.
Well, Percy's ability to control water and Frozen characters' ice powers could create some cool interactions. For example, Percy could make a stream of water and Elsa could freeze it to create an ice bridge. It would be a great way for them to traverse difficult terrains.
There's also 'Ice Skating in Camp Half - Blood'. This one is set in the Camp Half - Blood and features the characters trying to incorporate ice skating into their training. It's a fun read as it shows how the demigods with their different powers and personalities adapt to this new form of activity.
Another good place is Archive of Our Own (AO3). There are many creative writers who post their Percy Jackson ice fanfictions there. The tagging system on AO3 makes it easy to filter out the stories you're interested in. You can look for tags like 'ice', 'Percy Jackson', and related keywords to find the fanfictions you want.
One great Percy Jackson ice fanfiction could be one where Percy uses his water powers in an icy environment in a really unique way. For example, he might create ice sculptures that come to life to help him in a battle.