A really wild plot twist could be that the blessing is actually a ruse by Tartarus to use Percy as a pawn in a bigger scheme against the gods. Percy, being the hero he is, would have to figure out what Tartarus is up to and find a way to turn the situation around. This would involve him having to face some really tough challenges and make some difficult decisions.
Well, a plot twist could be that Percy's connection to Tartarus gives him the ability to control the very essence of the underworld. This means he can manipulate the shadows and the dark magic there. But because of his Lupa heritage, he also has a strong sense of loyalty and pack mentality. So, he forms an unlikely alliance with some of the more 'civilized' monsters in the underworld who also follow a code of honor. His friends from Camp Half - Blood are initially very skeptical and even a bit scared of him, but as they learn more about his new powers and how he's trying to use them for good, they start to come around.
A plot twist could be that Percy has a connection to the primordial forces that even the Titans and the Olympians are afraid of. His link to Nyx and Tartarus means he can access parts of the universe that are normally off - limits. For instance, he might be able to open portals to the darkest corners of Tartarus, which could either be a great advantage or a huge danger. Also, he could have the power to call upon the creatures of the night created by Nyx, and these creatures could be either his allies or a threat to the existing order of the demigod world, depending on how Percy chooses to use his powers.
Well, if Percy Jackson was born in Tartarus, it would mean he has a very dark origin. He might have some in - built powers related to the place. For example, he could have an easier time dealing with the monsters there. Also, his relationship with the Olympian gods would be even more complex, as they might view him with more suspicion due to his Tartarus - born nature.
One possible plot twist could be that they discover a hidden power within Tartarus that allows them to communicate with the gods in a way they couldn't before. This new connection might lead to a deal where they can earn their freedom by completing a near - impossible task for the gods. Another twist could be that they find an ancient prophecy written on the walls of Tartarus that foretells their role in saving not just themselves, but the entire world from a greater threat that the gods are unaware of. Or perhaps they encounter a long - lost civilization of powerful beings in Tartarus who offer to help them escape in exchange for a future favor that will put Percy and Zoe in a difficult moral dilemma.
One possible plot twist could be that Percy has hidden powers related to Kronos. Since Kronos is a powerful Titan, Percy might have some latent abilities that are similar but not as malevolent. For example, he could have a unique control over time on a small scale, like being able to slow down time briefly in a battle to gain an advantage. Another plot twist could be that the gods initially mistake Percy for being as evil as Kronos due to their relation. This would lead to Percy having to prove his loyalty to the gods and his friends all over again. He would face a lot of distrust and have to overcome many challenges to show that he is not like his 'twin' in nature.
A plot twist could be that Percy's blindness is a disguise by the gods. They made him blind to protect him from a prophecy that involves his sight. As he grows up, he discovers this truth. Also, in the world of Percy Jackson, there are many magical creatures. A plot twist could be that a certain creature, like a cyclops, takes pity on him because of his blindness and becomes an unexpected ally. This cyclops could have some unique knowledge about his blindness or a way to overcome it that no one else does.
One possible plot twist could be that Percy has a different set of powers. Since Hades is the god of the underworld, Percy might have an affinity for shadow manipulation or communicating with the dead in a more in - depth way than in the original stories. For example, he could be able to summon undead warriors to fight for him.
Well, a plot twist could be that Hercules' jealousy is actually a result of a spell cast on him. In the fanfiction, it could be revealed that a minor god, envious of Percy's popularity among the demigods, uses Hercules as a pawn. As Hercules tries to make Percy's life difficult, Percy discovers the truth and has to find a way to break the spell on Hercules. This could lead to an interesting journey where Percy has to delve into the darker side of the demigod world to find a solution.
Well, one possibility is that Percy has to deal with the various monstrous creatures in Tartarus. He might form alliances with some of the less evil ones to maintain order. Maybe he uses his powers over water in unique ways in the dark and chaotic environment of Tartarus.
One possible plot could be Percy having to face his inner demons in Tartarus. Maybe he has to battle new and terrifying monsters that are unique to that realm. He could also encounter old foes who have been made even more powerful in Tartarus.