Dark Ring

The dark rings are evil devices that the Digimon Emperor&#160;uses to control Digimon. Most of the Digimon working for him have dark rings, which must be destroyed to return them to normal. They are not unlike Devimon's Black Gears.

A&#160;similar device, the&#160;Dark&#160;Spiral, was created. One of the victims of these was Agumon.

It is later revealed by Myotismon&#160;that the design for the&#160;Dark&#160;Rings and Dark&#160;Spirals were based off of Gatomon's tail ring.