What are some interesting plot ideas for a 'Percy Jackson Son of Thanatos' fanfic?

Another plot idea is that Percy discovers secrets about his adoption. There could be a prophecy related to him being Thanatos' adopted son that he has to fulfill. This might involve him making difficult choices between his old life as a son of Poseidon and his new role, and he may have to find a way to combine the powers and responsibilities of both.

One idea could be Percy going on a quest to find a lost artifact that has the power to restore a dying part of the godly realm. This would involve him facing new monsters and making unexpected alliances.

One idea could be Percy discovering his connection to Hera later in his adventures and having to deal with the reactions of his friends. Another could be him having unique powers inherited from Hera that set him apart from other demigods.

Well, perhaps a plot where Percy has to enter Kronos' old lair to find a way to break a curse that is affecting his friends. He could face many challenges and traps there. Also, a plot where Percy discovers that Kronos had a secret plan that he now has to carry out, but it conflicts with his loyalty to the Olympians.

One idea could be Percy discovering new powers related to being the son of Hades. For example, he might be able to control the shadows in a unique way that no other demigod can. He could use this power to spy on enemies or to travel quickly through the underworld.

Maybe the son of Hades in the fanfic has a special bond with a particular type of monster that is usually associated with death, like a Cerberus - like creature. Percy Jackson and his friends are initially scared of this bond but then realize it could be used to their advantage. For example, the son of Hades could use this bond to control the monster and have it help them in a battle against a common enemy. The fanfic could also explore how the son of Hades tries to fit into the world of Camp Half - Blood while being different from the other demigods.

Well, a cool plot for a 'Percy Jackson Son of Khione Fanfic' might be that Percy is sent on a quest related to his new heritage. He has to find an ancient artifact that is tied to Khione's power. Along the way, he meets other demigods who also have unique powers related to cold or ice. They initially don't trust him because of his dual parentage but as they face challenges together, they learn to work as a team. He also has to deal with the internal struggle of being different from what everyone expected him to be.

Well, perhaps in the fanfic, Percy is wrongly accused of a crime by Zeus. He then has to go on the run, all the while trying to clear his name. Along the way, he teams up with some unlikely allies, like a group of nymphs who have their own reasons for helping him. As he's on the run, he uncovers a conspiracy within the Olympian council that could change the fate of the demigod world forever.

Another plot could involve Percy's relationship with other children of Hecate. Maybe there's a group of them that he has to lead in a battle against a common enemy. This would explore his leadership skills as well as his connection to his Hecate - related heritage. He might have to learn some ancient spells from them to defeat the foe.

In a fanfic, perhaps Percy and his friends accidentally stumble upon Medusa's lair while on a quest. But instead of immediately attacking, Medusa offers them a deal. She says she will give them a valuable clue to complete their quest if they help her get revenge on one of the minor gods who wronged her in the past. Percy and his friends then have to decide whether to trust Medusa or not.