- For the primary universe counterpart, see IKS Negh'Var.
In the mirror universe, the Negh'Var was the flagship of the Alliance. The Negh'Var was a Negh'Var-class ship equipped with a tractor beam. While under the command of the Regent, the ship is also referred to as Regency 1. (Star Trek CCG)
In 2372, Regent Worf commanded the Negh'Var on an assault on Terok Nor. However, the attack was thrawted by the mirror Defiant, with Benjamin Sisko commanding it. The Negh'Var was badly damaged and Worf ordered the flagship to retreat. (DS9 episode: "Shattered Mirror")
In 2375, the Negh'Var was equipped with a cloaking device stolen from Martok in "our" universe. Rom sabotaged the ship when installing the device, and the Negh'Var was easily overtaken by the Defiant. (DS9 episode: "The Emperor's New Cloak")
The Negh'Var was returned or recaptured by the Alliance at some point later in the year, when command was transferred to Captain Duras. Intendant Ro Laren used the Negh'Var as her flagship, though she repeatedly asked Legate Dukat for a Cardassian ship to transfer her flag to. The Negh'Var would later be returned to the command of Intendant Kira Nerys in the wake of the Terran defeat at Empok Nor and the exposing of Ro's treason to the Alliance. (DS9 novel: Saturn's Children)
Kira would continue to command the Negh'Var until her death in 2377. At that time Iliana Ghemor, posing as Kira, was in command. (DS9 novel: Warpath)