In Vinto, Engraved Lakes, there are creature living in the lakes and in order to survive an environment with no food, they had to adopt. They achieved a metamorphosis that specialized in regeneration and energy production. All of their other functions retrogressed as a sacrifice. While researching, Circus came upon them and picked out their specialized cells. They eventually insert the cell inside Circus I.D.s. It allows them to fly, which was originally what Gareki wondered.