The Cat Miraculous, also known as the Black Cat Miraculous, is a ring that, whenever Plagg inhabits it, transforms the wearer into a black cat-themed superhero with the power of Destruction.

To activate the ring, its user must speak the transformation phrase: Claws Out. To deactivate the ring, its user must speak the detransformation phrase: Claws In. To activate the ring for evil purposes, the user must speak the transformation phrase: Daggers Out. To deactivate the ring, the user must speak the detransformation phrase: Daggers In.

The ring is currently owned by Adrien Agreste, who uses it to transform into Cat Noir.