 When Hazel's mother changes her mind about helping Gaea, Hazel buries herself and her mother under the earth, delaying Alcyoneus's rebirth and killing them both.While Hazel's spirit is being judged, she gives up the chance to go to Elysium to save her mother from punishment, and they are both sent to the Fields of Asphodel instead.At some point before "The Lost Hero", Nico finds Hazel in the Underworld while trying to visit Bianca di Angelo, only to find she has tried for rebirth.