Ark of the Cosmos

The Ark of the Cosmos is a special stone that allows the wearer to manipulate gravity. They also seem to be some kind of power source as they were originally used to power Babylon Garden and Eggman used one to power the mother computer of MeteoTech. There are five stone in all and Sonic and his friends, the Babylon Rogues, and Eggman are trying to get them all. As Jet stated, "they're drawn to one another."