Heart of Darkness
Heart of Darkness (1899) is a novella by Polish-English novelist Joseph Conrad about a narrated voyage up the Congo River into the Congo Free State in the so-called "heart of Africa". Charles Marlow, the narrator, tells his story to friends aboard a boat anchored on the River Thames. This setting provides the frame for Marlow's story of his obsession with the ivory trader Kurtz, which enables Conrad to create a parallel between what Conrad calls "the greatest town on earth", London, and Africa as places of darkness.
Universe of Kingdom Hearts
In "Birth by Sleep", Master Xehanort's over-eagerness to obtain the weapon has him seek to clash two hearts of equal strength—one of pure light and one of pure darkness—with each other. He finds such a means through his former apprentice Ventus and the youth's personified darkness Vanitas, whom Xehanort created and enlisted to ensure his plans succeed. Though Ventus and Vanitas fuse back into one being with the χ-blade in hand, the reunion is not complete as the unstable χ-blade eventually explodes due to Vanitas' destruction within Ventus. The events of "Dream Drop Distance" reveal that, as a contingency to his previous plan, Xehanort has arranged the formation of his thirteen "Seekers of Darkness", the new Organization XIII composing of his various incarnations and vessels, to fight the Keyblade users who would form seven "Guardians of Light", or target the Princesses of Heart, to recreate the χ-blade.