IKS Taj (Tor'Kaht class)

The IKS Taj was a battlecruiser that was part of the house fleet of the House of Martok in the early 25th century. 

History
In 2409 Worf, son of Mogh, gin'tak to the House of Martok, commanded the Taj during the internecine struggle between Martok and the House of Torg. The Taj was the lead vessel of the Martok house fleet during their attack on the Torg stronghold in the Gorath system. 

Background
The ship's name means "knife" in tlhIngan Hol. 

The Taj is a reskinned KDF battleship-level NPC, whereas most named ships (of which the Tor'Kaht-class is a variant) in Star Trek Online are cruiser-level.