He might gain extraordinary powers. For example, he could get enhanced strength from Ares that allows him to defeat powerful monsters with ease. Or he might receive wisdom from Athena that helps him solve complex problems and outwit his enemies.
The blessings can also open up new paths for his adventures. Say he gets blessed by Hermes. He might be able to travel to places that were previously unreachable or travel at a much faster speed, which could lead to him exploring new regions of the mythological world and uncovering hidden secrets.
Well, one possibility is that Percy, being blessed by Zeus, could face a moral dilemma. On one hand, he has his loyalty to Poseidon, his father. But the blessing of Zeus comes with certain expectations. He might be caught in the middle of a power struggle between the two gods, and have to decide how to use the new - found powers without angering either of them.
In such a fanfiction, Percy might gain new powers. Since Khione is the goddess of snow, Percy could be blessed with ice - related abilities. For example, he could control ice, freeze water in a unique way, or even withstand extremely cold temperatures better than before. This would change the way he battles enemies and interacts with his environment.
One interesting plot could be Percy getting a new and extremely powerful ability blessed by a previously unknown god. This could lead to him having to face a new set of challenges and enemies that are specifically drawn to his new power.
He would probably become an even more formidable figure. With Nyx's blessing, he could have enhanced senses during the night, making him a better fighter in the dark. And from Uranus, he might receive a boost in his leadership abilities. Since Uranus was an important god in the Greek pantheon, this could give Percy more influence among the demigods and gods alike. He could be seen as a special agent of change, with the combined powers of these two deities.
Chiron, the centaur trainer at Camp Half - Blood, is often included. He has a vast knowledge of the gods and their ways, so he can guide Percy through understanding the nature of his blessings. He can also help Percy train to control any new powers that come with the blessings. Additionally, some fanfictions might include new or minor characters who are either the cause of the blessings or are affected by Percy's new - found status after being blessed by the gods.
One possibility in this fanfiction is that the wings change Percy in some way. They might give him a new perspective, literally and figuratively. As he soars through the skies, he could see things he's never noticed before on the ground. This could lead to him discovering new secrets about the demigod world or even his own powers. He might also face new challenges, like dealing with air - based monsters or learning to fly in different weather conditions.
Well, in a 'Percy Jackson Gets Arrested' fanfiction, perhaps he could be framed by a monster in human form. The police, not knowing his true identity as a demigod, might take him into custody. This could lead to a whole lot of chaos as his friends from Camp Half - Blood would surely try to break him out. They would have to figure out how to deal with the mortal legal system while also fighting off any monsters that might be taking advantage of the situation.
He might become an even more powerful figure. The trident could enhance his abilities to control water and perhaps give him new powers related to the sea. He could use it to defend his friends and fight against stronger enemies.
It could also lead to some chaos. The gods might decide to interfere in the real world based on what they read in the fanfiction. For instance, if they read a fanfiction where Percy has a different destiny, they might try to make it a reality or prevent it from happening, which would disrupt the normal order of things in the Percy Jackson universe.