Valisthea is a fictional world featured in the video game Final Fantasy XVI. It is characterized by its diverse landscapes, including lush forests, arid deserts, and towering mountains. The world is divided into several regions, each governed by powerful nations that harness the energy of Mothercrystals, large crystal formations that provide a source of magic and prosperity. In Valisthea, the inhabitants are often in conflict over the control of these Mothercrystals. The game explores themes of power, war, and the consequences of relying on such magical resources. Central to the story are the Eikons, powerful beings that can be summoned by certain characters, known as Dominants, who are tied to the crystals and their energy.