Zythurvia is the eighth level in The Cosmic Crystals IV: Zythurvia. It was a purple sun-like star that was so massive, it blew up in a supernova. It is the home of Zythurvion. As revealed after everyone leaves Watruin, Zythurvia was so massive, it became a black hole. There is a funnel in a lava world in a fireplace that can merge the Zyther Crystals into the Zythurvity Crystal.
It is mainly a retextured and flipped version of Rainbow Ride, Bowser in the Fire Sea, and Bowser in the Sky. The boss is Zythurvion, the final boss of the movie.
- Zythurvia's name derives from Zathura.