After bathing in the River Styx, Percy was given the curse of Achilles, making him invulnerable except for the small of his back. He loses this power when it is washed away in the Little Tiber surrounding New Rome, as part of his acceptance there.
In talking about everything having a purpose, I think that part of the reason that Percy lost the invulnerability in the Son of Neptune is because it served its purpose in the Last Olympian, and so it's not needed anymore. He only needed it to fight Luke/Kronos, and so there's (almost) no point in his having it now.
Exposure to the water of the Little Tiber negates the curse permanently, because it is a Greek blessing/curse that could not be retained in territory belonging to the Romans (i.e. Camp Jupiter), the enemies of the Greeks, according to Juno. We see an example of this when Percy loses the curse in The Son of Neptune.
When Percy takes a dip in the River Styx to gain this invincibility, he chooses his own weak spot, a tiny point in the small of his back. The reason given is that his enemies would be unlikely to target it, but a theory on Reddit points out how his choice also has metaphysical significance.
Now, to me, Percy seems to get really stronger in The Heroes of Olympus compared to him in first series. For instance when he killed the gorgons in The Son of Neptune, he used a form of hydrokinesis we've never seen: “Percy thrust out his hands.
Percy Jackson and the Olympians Season 2 Is About To Change Everything
Does Percy lose his powers?
After bathing in the River Styx, Percy was given the curse of Achilles, making him invulnerable except for the small of his back. He loses this power when it is washed away in the Little Tiber surrounding New Rome, as part of his acceptance there.
After the Battle of Manhattan in Percy Jackson and The Last Olympian (Book 5), all the demigods who fought on the side of the gods are offered rewards. Percy is offered immortality but declines it to be a mortal and live life with Annabeth.
In The Titan's Curse, Percy swings Riptide at a human named Rachel Elizabeth Dare by mistake and nothing happened to her. It is almost impossible to lose as it is enchanted to appear in Percy's pocket if it is somehow lost.
Annabeth Chase: Her fatal flaw is hubris, deadly pride. She thinks she can do anything better than everyone, even the gods, such as saving her family and building a brand new world exactly as she wanted (seen in The Sea of Monsters and The Battle of the Labyrinth).
The prophecy thus comes true in an unexpected way: Percy fails to save what matters most by allowing his mother to save herself. Upon returning to Camp Half Blood, Percy is betrayed by his friend Luke, son of Hermes, who turns out to be the human hero whom Kronos used for the theft.
Annabeth mentions that she had had a crush on him since she was 12, and that her feelings for him grew exponentially once he disappeared. Percy's love also grew exponentially to the point where he liked certain aspects of Camp Jupiter because he was thinking of their future.
An altercation with Clarisse allows Percy to discover his father is Poseidon, one of the “Big Three” gods. This revelation is cut short when a hellhound attacks Percy from the Fields of Punishment.
As a favor, Percy carries her across the Little Tiber, which is a powerful river. In doing so, he loses his invincibility (Achilles Curse) from the River Styx.
Annabeth is physically abusive. The fandom makes this point seem controversial and debatable, but it's really not. The definition of abuse is hitting someone. Annabeth hit Percy.
It is believed that Zeus is by far the strongest among the Big Three (a fact acclaimed in Percy Jackson's Greek Gods), due to possessing the Master Bolt as his weapon and being king of the gods.
Which character in the Percy Jackson and the Olympians had the saddest death? Michael Yew, Silena Beaguar, and Charlie Beckendorf had the saddest deaths.
Percy has very few memories of his father because Poseidon was forced to leave Sally and Percy to protect them from Zeus, who would be angry if he knew his brother had fathered a child. Demigods are considered powerful, and Zeus views them as a threat to his own position.
Percy regains his memory on their return to Camp Jupiter and finds an army of monsters led by Polybotes attacking it. Percy successfully defeats Polybotes with the help of Terminus, Percy's Cyclops half-brother Tyson, and Percy's pet hellhound Mrs. O'Leary.
Annabeth and Percy constantly sparred together but clearly Percy was the better sword fighter, regardless of using his powers. Annabeth was only ever to stop Percy when he was younger and inexperienced and in the Mark of Athena when Jason and Percy were possessed.
She can use a bow and is more agile than Percy. Nico himself said, after meeting Jason, that Percy was the most powerful demigod he'd met. That's true, but power, skill, and intelligence all play a key factor in a fight. Thalia's the daughter of the strongest god, and has similar power levels to Percy.
Yes, Annabeth is married to Percy Jackson, and has three kids: Cast, Ethan, and Zoe. How was Annabeth Chase born? Annabeth Chase is the half-blood daughter of the goddess Athena and the mortal man Frederick Chase.
Upon returning to Camp Half Blood, Percy is betrayed by his friend Luke, son of Hermes, who turns out to be the human hero whom Kronos used for the theft. Luke poisons Percy, and tells him before leaving that Kronos will rise and destroy the age of the gods. Western Civilization is unraveling.
Percy would have been able to control water as easily as Poseidon and it would be no wonder if he causes the largest Tsunami to ever happen. He would be a god, so if he is in his true form, mortals would get reduced to ashes if they see him with naked eyes in his true form.
