IRW Rhliailu was a D'deridex-class Romulan warbird in service in the 24th century, under the command of Admiral Lhian Mendak. Shortly following its launch, it was discovered that the Rhliailu's disruptor couplings were misaligned, causing overheating in the disruptor chamber if not kept at extremely low temperatures, but also resulting in maximized power output. This "flaw" led to several victories for the Rhliailu during the Dominion War, including at Brasîto. However, it could not be duplicated in other vessels.