Khronoss is the star at the center of the Khronoss System, and also the birthplace of all True Deities. It is entirely made of hot plasma, and radiates extreme amounts of heat from its core, which is constantly combusting. It is the primary source of heat and light for the 7 planets that orbit around it, including Odiem.
Despite being made of plasma, Khronoss possesses many mountains and cave systems. These landscape features usually change over time due to the constant nuclear reactions in its core, never lasting for more than a few days at a time. True Deities are the only beings who are able to dwell on Khronoss, both because of its extreme heat and light, and because its volatile surface is not solid.
Khronoss is about 100 times bigger than Odiem, and it's about 150 million kilometers away from it. True Deities have an enhanced perception of space and time, meaning that they can ignore such distances and effectively teleport from one astronomical body to another.
Time is convoluted within Khronoss, however it is known that it formed about two million years before the planets that orbit it (4.5 billion years before the Primordial Era.) There is no day or night in Khronoss, and no way to keep track of months or years. The star rotates around itself, and a complete rotation takes 28 days in relation to Odiem's rotation.