Phun Zhilaac

The Phun Zhilaac or Floating Demise was a legendary vessel, created by the Decuu Empire almost 2,000 years before the Battle of Yavin. It was thought lost shortly after completion, but was supposedly sighted numerous times over the next 1,800 years. It finally resurfaced again in 18 ABY.

Equipment
Numerous things about the vessels didn't add up. For instance, although the hyperdrive was listed as a Class 6, it had been known to travel with the speed of a Class 0.5 at times. In the same vein, the vessel had been known to sustain much more damage than its shield and hull strengths would indicate possible without breaking apart.

Similarly, though its weaponry was archaic, they were able to fire much more rapidly and with much higher speed than their specifications would indicate possible.