IKS Negh'Var
The IKS Negh'Var was a  that was in service with the Klingon  Defense Force in the late 24th century. 

Launched in the early 2370s, it was the first Negh'Var warship  in the fleet, and served as the flagship of the Klingon Empire. It was equipped with a cloaking device.

In early 2372, the Negh'Var led a task force consisting of hundreds Klingon vessels in an invasion of the Cardassian Union. It was commanded by General Martok (or rather the changeling infiltrator that replaced ). The vessel later led the attack on Deep Space 9. () 

In mid-2373, the Negh'Var, carrying Chancellor Gowron, retreated to Deep Space 9 along with other Klingon forces, which had been expelled from Cardassian space by the Dominion. ()

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