“In Path of Exile: Siege of the Atlas, two new Eldritch Horrors threaten to consume the Atlas of Worlds. Join Commander Kirac’s militia and defend the Atlas and Wraeclast itself against these celestial foes.
This large endgame expansion contains new Atlas systems, pinnacle bosses, one gigantic Atlas passive skill tree, Eldritch implicit endgame crafting, new unique items, the Archnemesis Challenge league and much more.”
Source: N4G PC Path of Exile: Siege of the Atlas Official Trailer