Niflheim continues their push into Lucis, their eyes ever on Insomnia and the Crystal. Over the years Niflheim develops technological advances that allow them to press their advantage, forcing the Lucians to retract the Wall to merely shielding the crown city of Insomnia. For decades the expansionist Empire of Niflheim has been at war with Lucis, but while they have conquered most of the rest of the world, they cannot touch Lucis due to the Crystal powering a magical barrier that shields the nation from harm. In the world of Eos, the Kingdom of Lucis possesses a Power Crystal that affords its nobility magical powers. note Game director Hajime Tabata has stated that while XV thematically remains part of Fabula Nova Crystallis, its mythos has since 'disconnected' from the subseries's core structure, and features lore vastly different from that of XIII and Type-0.
It is the sixth entry in the Fabula Nova Crystallis: Final Fantasy subseries, sharing a common mythology with Final Fantasy XIII and Final Fantasy Type-0, albeit with no direct connection. Final Fantasy XV, formerly known as Final Fantasy Versus XIII before its rebranding in 2013, is the fifteenth Numbered Sequel in the game-delayingly popular Final Fantasy series.
