The IKS Vaggor'ak was a D2-class ship, also known as a Bird-of-Prey that was in service during the 21st century, it was decommissioned in an honourable service in 2077.
After the Reaver incident, it was recommissioned in 2387 to be used to transport Klingon survivors to the Galactic Fleet. It was captained by Commander Ner'kek, but he fell during a Reaver attack, and was replaced by a Cardassian Captain called Sprearan after its joining with the Fleet. It was one of the lucky 85 ships that was able to escape the Reaver attack at the Ractorian Rift. Though it survived the attack, it is one of the unfortunate ships that was boarded by a Reaver Carrier.