IKS Gorkon
From Star Trek: Theurgy Wiki
The IKS Gorkon was a Klingon starship in service to the Klingon Defense Force in the 24th century. During the mid 2370's the Gorkon was commanded by Captain Klag.
In 2374 the Gorkon captured a Cardassian vessel and spared El-Aurian refugee Zyrao Natauna who defected to the Klingon Empire and served aboard the Gorkon as a civilian strategist until 2377.
(The IKS Gorkon is featured in the Star Trek: Klingon Empire, formerly Star Trek: IKS Gorkon series of novels where it is listed as a Chancellor (Qang) class warship. The IKS Gorkon should not be mistaken for the Excelsior class USS Gorkon that was Admiral Alynna Nechayev's flagship for the armada she assembled for a possible renewed Borg invasion in 2369. (Source: Memory Alpha)