Percy could add new realms for the gods to rule over. Such as a realm made entirely of music, where the god of music has absolute control. This would bring in new elements of culture and art into the fanfiction world of the gods.
He might introduce new relationships among the gods. Maybe a forbidden love between a god of the sun and a goddess of the night, which would create a lot of drama and conflict. This could lead to power struggles and changes in the divine hierarchy. He could also create new backstories for the gods, like a god who was once a mortal and achieved divinity through an extraordinary act of kindness.
By giving them unique physical features. For instance, a god with wings made of starlight.
A new demigod who has a very different set of powers from Percy. This demigod could be from a previously unheard - of parentage among the gods. For example, a child of Hypnos, the god of sleep, who can put people into different levels of sleep - like a deep coma - like sleep or a trance - like state. This would add a new dynamic as Percy has to figure out how to work with someone with such a different power set.
Zeus is a possibility. As the king of the gods, he might see Percy's potential and adopt him to have an ally among the demigods. Another could be Poseidon, since Percy is already his son in the original story. It would be an interesting twist to have Poseidon formally adopt Percy in a more divine way.
Well, in this fanfiction, Percy might have all kinds of adventures. He could be tested by the gods in strange ways. Maybe he has to prove his worth again, like facing some new and powerful monsters created by the gods just for him.
In the fanfiction, Percy might sing to the gods as a way of expressing his own internal struggles. He could be feeling lost or confused, and the act of singing to the gods is his way of seeking guidance. He might pour out his heart about his identity as a demigod, his relationship with his father Poseidon, and his place in the world of the gods and mortals.
The plot might involve Percy having to complete a series of difficult tasks assigned by the gods. For example, he could be sent on a quest to retrieve a powerful artifact that has been lost or stolen.
Well, it could be about Percy having a new life in the realm of the gods. Maybe he gets special powers and training from them. He might also face new enemies that are threats to the gods, and he has to use his newfound abilities to protect the divine world.
Well, one possibility is that the gods are punishing Percy for some perceived disobedience. Maybe he defied their orders during a major quest and now they're making him suffer. For example, they could be sending him through never - ending trials in a hellish realm.
Perhaps the blessings make Percy a target. Other demigods or villains might be jealous of his new status. He then has to deal with the envy and threats while also trying to figure out how to fully utilize the blessings in a positive way. For instance, the gods' blessings might come with some sort of side - effect that he has to overcome as well.
Perhaps Percy leaves the gods after a great battle. He realizes that the cycle of the gods using demigods for their own purposes will never end. He decides to break free and start a new life. He could be seeking a place where he can be his own master and not be at the mercy of the gods' whims.