He might face the challenge of overtraining or undertraining. Since he doesn't have a coach or a training partner to tell him when he's doing too much or too little, he could end up either exhausting himself or not making enough progress. In fanfiction, he could also struggle with loneliness. Training by himself means no one to share his frustrations or small victories with. This loneliness could potentially affect his mental state and in turn, his performance. Additionally, without feedback from others, he may develop bad habits in his training that could be hard to correct later on.
A big challenge would be in the area of magical or supernatural training. If his powers are related to the gods or some other mystical source, without proper guidance, he could misinterpret how to use them. For example, if he has a new power related to water manipulation, he might not know the full extent or the correct way to use it without someone more experienced to teach him. He may also face the challenge of self - doubt. When training alone, there's no one to reassure him that he's on the right track, and this self - doubt could slow down his progress or even make him give up on certain aspects of his training.
The environment itself is a big obstacle. Tartarus is a place of extreme darkness and chaos. It can mess with Percy's mind, making it difficult for him to focus on his training. The terrain is also treacherous, with rivers of fire and bottomless pits.
One major challenge could be the powerful and malevolent creatures that inhabit Tartarus. Monsters like the Titans or other ancient evils would try to stop him. They are much stronger than the usual foes he faces on the surface. Another challenge is the very nature of Tartarus itself. The place is designed to be inescapable, with its dark magic and chaotic environment constantly working against Percy.
He could also face challenges related to the knowledge required to use his power effectively. In fanfiction, there might be ancient texts or prophecies that he needs to decipher in order to fully understand and utilize his new powers. But these texts could be written in a long - lost language or be guarded by powerful entities, making it difficult for him to access the necessary information.
One of the main challenges would be the dangerous environment. Tartarus is filled with all kinds of monsters and hazards. Percy would constantly have to protect the child from these threats. Also, the lack of proper resources like food and clean water could be a huge issue. There's not much in Tartarus that is suitable for a growing child.
He could practice his combat skills by creating imaginary opponents. He can visualize different types of foes with various fighting styles and then strategize how to defeat them. For his physical strength, he might use the natural environment around him. For example, climbing trees or lifting rocks. When it comes to his powers, he could experiment in a safe area. If he has water - based powers, he can find a small pond or stream and practice controlling the water.
One of the main challenges could be the lack of immediate feedback. When training alone, Naruto doesn't have a partner to correct his mistakes right away. For example, if he's working on a new jutsu, he might not realize he's performing it slightly wrong until it fails completely. Also, he has to motivate himself without the competition or support of his peers. He might get bored or frustrated easily since there's no one around to cheer him on or push him further.
He could learn special combat skills. His dad, Poseidon, might teach him unique ways to use water powers in battle, like creating more powerful water whips or shields.
One challenge could be overexertion. He might push his body too far and risk injury. In fanfiction, Naruto's intense training might also attract unwanted attention from enemies who see his growth as a threat. Another challenge could be self - doubt. Despite his determination, there might be moments when he questions if his efforts are enough to reach his goals.
Percy might struggle with his new identity. He has been a demigod for so long, and suddenly becoming a primordial god means he has to re - evaluate his place in the world. He may miss his old life, his friends, and the simplicity of being a demigod. Adjusting to the new powers and responsibilities is not going to be easy.
One challenge could be the time - warping effect of the casino. Time moves differently there, and Percy has to fight against getting caught up in it himself while trying to find Nico. Another might be the various distractions, like the all - you - can - eat buffets and the never - ending games that are designed to keep people inside.