The Forgotten One is the main antagonist and final boss in Castlevania: Lords of Shadow's two DLC stories, Reverie and Resurrection. He is an extremely powerful Demon King second only to (and maybe even on par with) Satan who rules over the Elemental Plane of Darkness, where he was sealed millennia before the game's events. Shortly after defeating Satan, the primary protagonist Gabriel Belmont sets out to prevent his return, triggering his own descent into Darkness.