Oria is a realm that is mostly water and sea with many islands both large and small scattered through out it. The waters are very dangerous containing deadly sea monsters, huge storms and strong currents. Each island contains a mineral that exhibits a magnetic force. This force though not effecting metal objects does make compasses completely useless. All navigation is therefore done by people with the innate ability to sense the electric frequency that each island projects. These individuals are known as Ambiteer.
Due to the distance between landmasses and the lack of large continents trade is an extremely valuable asset for any large civilization. That is where Guilds come in. Guilds are the true leading power in Oria. Though there are many kingdoms and many rulers almost all of them adhere to the power of the guilds. For without there powerful navy no island can obtain the resources it needs for survival. Guilds also have control over most the Arbiteers and they are considered as one of the guilds most valuable asset.