The huge Negh'Var-type warship from which Regent Worf commanded the Klingon-Cardassian Alliance fleet in the mirror universe, beaten at Terok Nor and later captured by the Terran rebels.
The Regent's flagship is the command ship of Worf, Regent of the Klingon-Cardassian Alliance in the mirror universe. It resembles the Negh'Var of the prime universe but is shown as far larger.
It first appears in Shattered Mirror, in 2372, leading the fleet sent to retake Terok Nor from the Terran Rebellion. Garak serves aboard as Worf's cringing subordinate. The rebels' new Defiant, with Benjamin Sisko in command, damages the flagship so badly that Worf must withdraw.
In The Emperor's New Cloak, three years later, Worf has a cloaking device fitted, brought from the prime universe by Quark and Rom as the ransom for the captive Grand Nagus Zek. Rom sabotages the installation, the ship loses power, and the Regent surrenders to the rebels.