C120 The Third Prince of the East China Sea, Ao Yun
Normally speaking, when an immortal ascended to the heavens, they would ride a white cloud. When they reached the level of an Earthly Immortal, they would be able to ride a white cloud, while when they reached the level of a Celestial Immortal, they would be able to ride a two-colored cloud. True Immortals were three-colored clouds, Mysterious Immortals were four-colored clouds