The Koranak under attack.
The Koranak was a Cardassian Keldon-class cruiser that illegally operated by the Obsidian Order as part of the joint Tal Shiar/Obsidian Order attack on the Founders' homeworld in 2371. For that operation, the ship was modified with an increased top speed and a cloaking device from the Romulans. The attack failed, and the Koranak was later lost in the ensuing battle. (DS9: "The Die is Cast")