One idea could be having Percy taming a rare and powerful sea monster that was thought to be uncontrollable. Another could be him using his skills to tame a group of monsters to fight against an even greater evil. Maybe he could tame a monster that has the ability to travel through different realms, opening up new adventures.
A unique idea for Percy Jackson Monster Tamer Fanfiction could be Percy finding a way to communicate with the souls of dead monsters and taming them in their spectral form. This could lead to a whole new set of challenges and adventures as he tries to control these ethereal creatures. He might also encounter a monster that can shapeshift, and he has to figure out how to tame it in all of its forms. And what if he tamed a monster that was created by a god as a punishment, and now he has to deal with the god's wrath for taming it?
I think Cerberus could be an interesting one. It guards the Underworld, and taming it would involve not only dealing with its three heads but also its loyalty to Hades. Percy would have to find a way to convince Cerberus that he's not a threat and that it should follow his commands. It would also open up some cool storylines about exploring the Underworld with a tamed Cerberus by his side.
One idea could be a story where Percy has to team up with a monster that has been wrongly accused. Maybe a centaur is framed for stealing a powerful artifact from Camp Half - Blood. Percy, being the hero he is, decides to help the centaur clear its name and in the process discovers a new threat to the demigod world that involves an ancient monster alliance.
In Percy Jackson half - monster fanfiction, a possible plot could be that a half - monster has the power to see the future. However, the visions are often unclear and cause a great deal of confusion. They join a group of demigods on a quest, and their visions are crucial to the success of the mission, but they also have to deal with the fact that some of the demigods think their power is a sign of evil. Another idea is a half - monster who is half - centaur and half - something else. They are incredibly fast and strong, but their centaur side makes them a target for some hunters who believe centaurs are wild and should be tamed. So, they go on a journey to prove that they are not just a wild creature but a sentient being with their own will. Also, a half - monster with the power to manipulate dreams could be a great plot. They accidentally get caught up in a nightmare that is spreading among the demigods and must use their power to stop it before it consumes everyone.
In some 'Percy Jackson Gifts' fanfics, a unique idea is that Percy's gift is the ability to communicate with long - lost mythical creatures. This allows for new adventures and interactions. Another is when his gift is a time - traveling power which he uses to change certain events in the past to save the future.
A cool plot could involve Percy as a super soldier being sent on a secret mission by the gods. This mission might be related to a new threat that combines the mortal world's technology and the mythological realm. He would have to use his super soldier skills, like enhanced strength and combat training, along with his demigod powers to succeed.
One unique plot idea could be that Percy discovers he has a special connection to the dragons because of his demigod powers. Maybe he can communicate with them on a deeper level than others. Another idea is that the dragons are the key to solving a new threat to the demigod world, like a powerful ancient evil that only the combined strength of the demigods and the dragons can defeat.
One idea could be Percy having to face a new type of monster that is a combination of all the previous ones he's fought. This super - monster could be created by an ancient and powerful enemy who wants to truly become the king of monsters. Another plot could involve Percy having to enter the realm of the dead to find a weapon that can defeat the king of monsters. Maybe he has to make a deal with Hades to get this weapon.
In some fanfictions, Percy has the ability to travel between different pantheons' realms. So not just the Greek world but also the Norse or Egyptian ones. This creates a really cool crossover and allows for some amazing battles and friendships to form across different mythologies.
A really interesting plot could be a time - travel fanfic where Percy and Dionysus end up in ancient Greece together. They have to deal with the different rules and social structures of that time while also trying to find a way back. This would allow for a lot of exploration of the origin of Dionysus' powers and how Percy's modern - day thinking clashes with the ancient ways.
One unique plot idea could be Percy Jackson finding himself in the world of Arcane and having to deal with the chaos of its magic system while still retaining his demigod powers. Another could be the characters from Arcane being introduced to the Greek gods and their complex politics.