It could be that Naruto is sent to Olympus as part of a challenge or a test. He doesn't understand the ways of the gods at first and his brash ninja behavior is seen as disrespectful. This angers the gods and they try to punish him. But Naruto, being the strong - willed character he is, decides to fight back and in the ensuing battle, his attacks cause destruction to Olympus.
One possibility could be that Naruto is somehow transported to the world of Greek mythology where Olympus exists. Maybe his powerful jutsu are seen as a threat to the gods on Olympus. He could start by accidentally causing chaos in a nearby village which gets the attention of the minor gods. As they try to stop him, he realizes he has to fight back to protect himself and in the process, his attacks end up targeting Olympus.
Perhaps in this fanfiction, Naruto is on a mission to retrieve a powerful artifact that is being held in Olympus. The gods, not wanting to give it up, start a battle with Naruto. Naruto, with his ninja skills and chakra, gradually overpowers the defenses of Olympus. His Rasengan could be the key weapon that he uses to break through the magical barriers around Olympus.
Maybe Naruto gets some sort of dark power that makes him go berserk and start destroying everything in his path. For example, he could be influenced by an ancient evil curse.
His Sage Mode could give him an edge. In Sage Mode, Naruto has enhanced strength, speed, and perception. He could use these abilities to dodge the attacks of the gods and then counter - attack. For example, he could sense the weak points of the gods' defenses and target them with his Rasengan or other powerful jutsu.
Well, it could be about Naruto being somehow transported to the world of Greek mythology in the Prince of Olympus setting. Maybe he has to learn the ways of the Olympians and use his ninja skills in a new context. For example, he might face off against mythical beasts using his shadow clone jutsu.
In this kind of fanfiction, Naruto might be banished due to some false accusations or political conspiracies in Konoha. Once banished, he could decide to destroy Konoha out of anger and a sense of betrayal. He may have learned powerful jutsus during his exile and use them against the village that once rejected him.
A possible plot might involve Naruto being exposed to some ancient and powerful knowledge or artifact. This discovery gives him the means to 'destroy' bloodlines in the sense that he can change the very nature of chakra within a person. He might use this new - found ability to break the cycle of bloodline - based power hierarchies. He could start with the major clans like the Uchiha and Hyuga, and as he spreads his influence, the concept of bloodline superiority slowly crumbles, leading to a new era in the Naruto world where a person's worth is determined by their own efforts and skills rather than their bloodline.
There could also be some ancient monsters or spirits that are tied to Olympus' existence. They might rise up to defend it because their own survival is linked to the continued existence of Olympus. These could be powerful beings that Percy has never faced before, adding an extra layer of danger to his quest to destroy Olympus.
Well, perhaps Harry has finally had enough of the Ministry's corruption and inefficiency. So he decides to take it down using his powerful magic skills. He might start by exposing all the dark secrets hidden within the Ministry walls, which could lead to chaos and the downfall of those in power.
The plot might involve Percy gathering ancient artifacts or allies. He could go on a quest to find a weapon that can harm Gaea on a fundamental level. Along the way, he overcomes many challenges and personal demons. When he finally faces Gaea, he combines his strength, the power of his friends, and the magic of the artifacts to completely destroy her, bringing peace to the world of the gods and demigods.
One possible plotline could be Percy being betrayed by the gods and thus deciding to take on Olympus. Maybe he discovers some dark secrets about the gods' rule that make him believe destruction is the only way to bring true justice.
In this fanfiction, perhaps Percy is influenced by some dark force. This force convinces him that the Olympians are corrupt and need to be overthrown. He then betrays them by stealing important artifacts from Olympus that are crucial for its protection. He might also try to turn the demigods against the Olympians.