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Erebos (also spelled as Erebus) is the name for the great black walls of Hades' kingdom. Erebos is also the primordial god of Darkness and Mist.

Percy Jackson and the Olympians

The Lightning Thief

Percy Jackson sees the part of the Underworld called Erebos while he is on Charon's barge when he enters the Underworld for the first time.

The Last Olympian

Percy sees the place Erebos in the distance as he makes his way towards the River Styx after escaping from Hades' Palace.

The Trials of Apollo

The Hidden Oracle

When Apollo questioned how the Germani that Nero had with him were here despite being from ancient times, Nero responded that souls always escaped from Erebos even before Gaea commandeered the Doors of Death. It was quite easy for a god-emperor like him to call back his followers.[1]


In some stories, Erebus is a region of the Underworld where the dead had to pass immediately after dying. It is sometimes used interchangeably with Tartarus.


  • Erebus was never actually directly mentioned in the series.[2]


  1. The Hidden Oracle, page 142.
  2. The Last Olympian, page 117.
Underworld: DOA Recording Studios | Doors of Death | Door of Orpheus | Elysium | Erebos | Fields of Asphodel | Fields of Punishment | Hades' Palace | Isles of the Blest | Judgment Pavilion | Persephone's Garden
Rivers: Cocytus | Phlegethon | Styx | Lethe | Acheron
Tartarus: Mansion of Night | Hermes' Shrine | Chaos