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.
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.
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.
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.
Percy Jackson meeting the Norse gods in fanfiction could lead to some epic quests. The Norse gods might enlist Percy's help in retrieving a lost artifact that has the power to disrupt the balance between the worlds. Percy, with his skills and knowledge from the Greek world, would bring a unique perspective to the task. There could also be some humorous moments as he tries to understand the Norse gods' accents or their rather strange (compared to Greek) ideas of hospitality.
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.
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.
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.
In the 'Percy Jackson Gets a Second Chance' fanfiction, he could form stronger alliances. Maybe he'd reach out to some characters he didn't fully trust before. He could also use this second chance to get closer to his family, like his mom, and protect her better from the threats of the mythological world. He might even be able to prevent some of the major disasters that happened in the original story.
Well, in a fanfiction like this, there could be a lot of chaos. Maybe the gods would show up in all their glory during the assembly and start arguing over which cabin at Camp Half - Blood is the best. Percy would probably be in the middle of it, trying to keep the peace.
One thing that could happen is that the gods' powers start to wane during the war. This would force Percy to rely more on his own wits and the strength of his friendships. For instance, if Zeus's power over lightning is weakened, there could be storms out of control, and Percy would need to find a way to calm them, perhaps by using his unique relationship with water to counteract the electrical chaos.