The Sun

The Star of Cerulean (The Sun): At the very center of the Cerulean Ocean is a star, the Cerulean Sun. It pulses daily and over the course of the Cerulean year, creating seasons and the day-night cycle of the Great Trees.

The Sun gives everything to the world of Cerulean in the form of light and heat, and the elements that make up the physical components. Also though, the legends say that the Nebuls themselves are born from the sun.