The Raid on Hades

The raid on Hades was when one of the demigods in the Titan Army entered the Underworld and stole The Sword of Hades (an unauthorized symbol of power that Persephone ordered to be created). The demigod later revealed as Ethan Nakamura was sent to steal the sword for Kronos because it had one of The Keys of Hades (which would be able to imprison a soul, release one or even summon the damned out of Tartarus). Persephone abducted Percy Jackson, Thalia Grace and Nico de Angelo to recover the sword. They were given a plant which they were told would lead them to the sword and as the closer the thief got towards escaping petals would begin to fall off. The plant led them to The Fields of Asphodel then to The Fields of Punishment where they came across Sisyphus. Thalia agreed to push his boulder for a while in exchange for information. Sisyphus informed them the demigod had one eye a package (the sword) and that he had told the demigod to see Melione. This information let the three know who the thief was. Sisyphus then tried to distract the three as to escape and permanantly leave Thalia with the boulder (this attempt failed). This is