The Na'Qjej class, also known as Klingon cleave ship was a warship used by the Klingon Empire's Great House of T'Kuvma in the 2250s. (DSC episode: "Battle at the Binary Stars", STO website: The Section 31 Lock Box)
During a cease fire at the Battle of the Binary Stars, the Sarcophagus's commander, T'Kuvma ordered the cleave ship to ram into the USS Europa in order to demonstrate the cloaking device for the High Council.(DSC episode: "Battle at the Binary Stars")
In 2257, the cleave ship was the flagship of Chancellor L'Rell as she coordinated the Empire's efforts to support the USS Discovery and USS Enterprise during the battle against Control. (DSC episode: "Such Sweet Sorrow").
- Na'Qjej class article at Memory Alpha, the wiki for canon Star Trek.
- Cleave ship article at The Star Trek Online Wiki.