Mysterious and ancient, the Leviathan was a sentient, organic ship which entered the Farpoint system and began heading towards the planet. Thirty kilometres long and demonstrating terrifying power, the ship immediately responded to probes with hostility.
After it abducted a pilot and returned him lobotomised, Rogue Squadron sent a party onboard to investigate further, and to try turn the ship away from Farpoint.
Much of the team fell victim to the ship's equivalent of an immune system, but they did eventually succeed in changing the ship's course. It seemed the ship was in some way hurt by subspace communications, and tried to destroy any source, resulting in attacks on the Ja'torb homeworld and Rogue Squadron.
Files recovered aboard the Star Destroyer Reaper showed that the Eighth Imperial Fleet later found the Leviathan dying and effectively harvested it for technology, which formed the base for their nanotechnology.