Some Tartarus fanfictions focus on Percy's mental state while in Tartarus. It could explore his nightmares and how he copes with the overwhelming sense of despair. For instance, he might have visions of his friends and family in danger back on the surface, and he has to find the strength within himself to keep going in the face of such mental torture.
One great Percy Jackson Tartarus fanfiction is 'Into the Depths of Tartarus'. It really delves into the horrors Percy and his friends might face there. The author does a great job of describing the dark and dangerous environment, making it feel very real.
One interesting plot could be Percy's struggle to control his new powers as the God of Tartarus. He might face challenges from other gods who are threatened by his rise. Another could be his journey to reform Tartarus, making it less of a hellish place. For example, he could try to bring some order to the chaotic entities that reside there.
A great plot could involve Percy finding a way to use the unique environment of Tartarus to his advantage. For example, there could be some sort of energy in Tartarus that he discovers he can harness to become stronger, but it has a dangerous side - like it might slowly corrupt him. He then has to struggle with the decision of whether to keep using it to get out or resist it.
Well, a great plotline might be Percy's struggle with his own inner demons while in Tartarus. He could be haunted by his past failures and the fear of not being able to save his friends. This internal battle could be paralleled with his physical battles against the terrors of Tartarus. Also, there could be a plotline where Percy discovers a long - lost power within himself that is the key to either ruling Tartarus or escaping it.
Another plot could be that something from Tartarus has followed Percy out. A small, malevolent creature that starts causing trouble in Camp Half - Blood. Percy feels responsible for it and has to find a way to send it back to Tartarus without putting everyone in danger.
One possible plot twist could be that Percy discovers a hidden power within Tartarus that he can use to his advantage. Maybe it's a long - lost magic that only the darkest part of the Underworld can unlock.
Another plot twist might be that Tartarus itself has a weakness that Percy discovers by accident. For example, he might notice that certain sounds or vibrations can disrupt the structure of Tartarus. This would completely change the game as he could then use this knowledge to his advantage, perhaps causing mini - earthquakes to distract or even harm the monsters that are after him.
Well, perhaps a plot twist is that Percy doesn't escape in the traditional sense. Instead, he finds a way to manipulate the rules of Tartarus so that he can exist in both Tartarus and the mortal world simultaneously. This could lead to some really interesting story developments as he tries to keep this a secret from his friends while also using his new - found ability to fight against the forces of evil. Also, it could be that the escape route he finds is actually a trap set by an enemy, but he manages to turn it around and use it to his advantage in a really unexpected way.
In a Percy Jackson Tartarus fanfic, a great plot could be centered around Tartarus corrupting the very essence of Percy's powers. He starts to lose control of his water - based abilities and instead they become tainted with the darkness of Tartarus. Percy then has to go on a journey within Tartarus to find a way to cleanse his powers, all while being hunted by the most dangerous creatures that lurk in the abyss.
One interesting plotline could be Percy's struggle against the various monsters in Tartarus. He might have to use his wits and powers in new ways to survive. Another could be his journey to find a way out, perhaps making unexpected alliances with other beings trapped there.