Keg
This rainbow coloured wind elemental was something that Ryu didn't recognize. He hadn't known that such an existence could flourish until the Heavens pointed him in this direction.
This rainbow wind was known as True Heavenly Wind, and it was a point upon which all four Heavenly Winds converged. However, it wasn't as simple as just taking up this wind and suddenly gaining four Heavenly Winds.
Each of the Heavenly Winds embodied their own path, whether that be of storm, of natural wind, of sharpness or of healing. The True Heavenly Wind, though, embodied the chaos of wind and focused on one word: Change.
In the real world, wind was unpredictable and it was at the centre of weather being so unpredictable. Even a Dao God could likely not predict the weather more than a set time ahead without risking being entirely wrong. This was simply the way of wind.