Lucis The Kingdom of Lucis is a nation in the " Final Fantasy XV Universe " . It contains Eos ' s Crystal within its capital , Insomnia . It is ruled by the Lucis Caelum bloodline that is sworn to protect the Crystal and can wield its power . Lucis is described as highly advanced and culturally intact . Lucis prospers thanks to the presence of its Crystal . This magical artifact alienates the kingdom from the rest of the world , which has fallen under Niflheim ' s control . Insomnia ' s Crystal is kept safe from those who would seek to steal it by King Regis , who ages rapidly because he must use the Ring of the Lucii to maintain the Wall around Insomnia . King Regis has a son and heir , Noctis . Story . Early history . Lucis was established during the Ancient Era . Solheim had fallen , and Starscourge had been brought into the world . A mortal man is said to have fought the darkness with the gods , and been given special powers to his bloodline , the Crystal to protect and the Ring of the Lucii . He became the king of Lucis , a nation established to the east od Eos , and his bloodline would reign for over two thousand years . Niflheim declared war on other countries to expand its territory . Their two primary targets become the Kingdom of Lucis , which possesses the Crystal , and Tenebrae , led by the Oracle . Circa M . E . 606 , the Lucian army , even with their alliance with Accordo , was being overwhelmed by the weapons of the empire . The king erected the Wall around the Cavaugh region that included the Crown City , and assumed a siege position . The Lucian army was dissolved and reorganized into a countermeasure - only defense force , the Crownsguard . Due to the defeat of the allied forces , the Niflheim army invaded the regions of Leide , Duscae , and Cleigne , where they began establishing bases and a period of peace followed . Lucis challenged the empire , but were pushed back by the Magitek Troopers and defeated . M . E . 725 the Lucian prince Regis Lucis Caelum — who had traveled to Accordo with a select few to seek the restoration of an allied force — withdrew to the Crown City due to the Lucian army ' s defeat . The Wall was pulled back to Insomnia ' s ramparts to maintain the strength to resist the empire ' s invasion efforts . Between the years 744 – 756 the conflict between Lucis and Niflheim continued . Niflheim renewed its offensive against Lucis with the attack on Fenestala Manor when Regis , now king , and his son Noctis were visiting Tenebrae . Although the stalemate became prolonged due to the drastic reduction of Niflheim ' s military forces in the battle with the Glacian , Lucis remained in the unfavorable position . " " . On the outskirts of Lucis , the Kingsglaive battles the combined forces of Niflheim and Tenebrae . Feigning a desire for peace , the empire infiltrates Insomnia and steals the Crown City ' s Crystal . The Wall falls and Insomnia is destroyed by Magitek Troopers and daemons , although Nyx Ulric commands the Old Wall to defend the city . " Final Fantasy XV " . When Noctis , Ignis Scientia , Gladiolus Amicitia , and Prompto Argentum learn Insomnia has fallen and King Regis is dead , they traverse the many regions of Lucis to reach Altissia where Noctis is to rendezvous with Lunafreya Nox Fleuret , the Oracle . The Crown City has been overtaken by imperial forces and blockaded , and the magitek infantry patrols the Lucian territories in dropships . Niflheim begins building military bases to the Lucian land , and its banners are erected around Lestallum and other outposts in the area . The citizens passively oppose the takeover , celebrating when news comes in that Prince Noctis is still alive , and that the local imperial bases have been demolished by infiltrators . After the world becomes trapped in an endless night for ten years due to the Starscourge , the world order falls apart . The empire crumbles as well , and daemons take over the world . Lestallum still provides power with its power plant , and as its lights keep the daemons at bay , most people move to live there and the rest of the lands are left abandoned . Noctis and his friends return to the ruins of Insomnia so Noctis can reclaim his throne and fulfill his destiny as the True King . As he sacrifices his own life to bring light back to the world , and doesn ' t have heirs , it is unknown what comes to Lucis afterward with its royal family gone . Economy . Lucis thrives thanks to its vast realm being home to many ecosystems , and thus , resources that lie throughout . However , there is a nationwide economic disparity between the Crown City citizens and those who live on the outlands , as Insomnia has been isolated from the rest of Lucis for 30 years under the rule of King Regis . The outlands suffer from a lack of infrastructural development and decline of major fields of commerce and industry . It is implied in " Final Fantasy XV Prologue Parting Ways " that the way of life outside Insomnia has stagnated , being in many ways that of three decades behind of the Crown City . Products from Insomnia are valued throughout the outer regions , as they are difficult to come by . Many varieties of fish exist throughout Lucian waterways . Fish are valued as food and for their components used in consumer products . Hunting is a both a civil service and a contribution to the economy whose goods and game from wild monsters are valued to maintain environmental stability and civil peace . Wild beasts ' appendages can be salvaged into tools , crafting materials , and items of luxury . Many abandoned mining operations litter the realm . Due to the rescaling of the Wall 30 years ago , daemons likely make excavation and extraction work difficult to continue . Personal modes of transportation , such as car s , are also an evidence of the divide , as models now discontinued in the Crown City exist in continued circulation . Because of the lack of a direct method of obtaining raw earth materials to process into metals and diesel fuels , recycling and scrap re - salvaging is a common practice in the outer lands . Colored stones and ores are valued as a source of paint , building stones for infrastructure , and their accessibility for their sources remaining above ground . The town of Lestallum and its Exineris power plant provides a constant source of electricity due to mining crystals related to the Disc of Cauthess that are used as a power source . Other appearances . " Theatrhythm Final Fantasy " . Lucis serves as a background during the " Somnus " Field Music Sequence . Creation and development . Insomnia is designed to resemble , a part of Tokyo . Black is prominent throughout the kingdom , as is the Grim Reaper . In promotional material for " Final Fantasy Versus XIII " , a large statue of the entity is seen holding a painting of the goddess Etro . Director Hajime Tabata has stated black is important in Lucis ; it is worn by the kingdom ' s royal family . Concerned about the rating " Final Fantasy XV " would receive in some countries , Tabata toned down the theme of reaper worship that was prominent in the game ' s source material . Black replaced explicit references to this . Etymology . Lucis juxtaposes Tenebrae , a kingdom whose name means " darkness " in Latin . While Tenebrae represents an " old school " fantasy kingdom , Lucis is technologically advanced thanks to the Crystal it keeps within Insomnia .