Koros - Strohna Koros - Strohna , known as worldships in Galactic Basic Standard , were immensely large , organically created vessels that housed entire communities of Yuuzhan Vong , providing them with food and shelter . They also served as a staging ground for long battles . Characteristics . Similar in function to the reborn Emperor Palpatine ' s " Eclipse " - class Super Star Destroyers , a worldship was a transport , battleship and a psychological weapon all in one . Dimensions . Like all other Yuuzhan Vong vehicles and vessels , the Koros - Strohna , or worldship , was made of Yorik coral . The Yorik coral also formed symbiotic relationships with countless other organic materials to provide weapons , propulsion systems and defensive capabilities . Maw luur served as a recycling system as well as provided valuable life support to the vessel . A worldship had more in common with a planet than a starship and , like most other Yuuzhan Vong bio - engineered vessels , it did not appear to be a starship at all . Its main body was a disc - shaped bulk littered with hundreds of weapon projections and other protrusions . On the edges of the worldship were several large spiral arms , causing the ship to resemble a galaxy . In areas where the gravitational pull was weak , including the region between galaxies , the Koros - Strohna extended membranous tendrils called outrider ganglia . Each tendril was anchored by hundreds of Coralskippers , which helped unfold the membrane . Once unfurled , the ganglia served as cosmic sails . Propulsion systems . Dovin basal s could also be used to propel the worldship by projecting gravity wells to drag Yuuzhan Vong ships through the interstellar void . When these organisms concentrated their energy wells , they could cause a space station to collapse or force a moon to collide with its orbital partner . Dovin basals could also be used to strip enemy vessels of their deflector shields . The worldship ' s own defenses also relied on the dovin basals ' ability to use gravity wells to intercept incoming torpedoes and other weapons . To conserve power , worldships could generate artificial gravity by rotating , thus preserving the dovin basals . They also made use of a membrane , called outrider ganglia , that acted as a solar sail when traveling through space . Offensive and defensive systems . Worldships were protected by hundreds of yaret - kor emplacements that spat molten slag at enemy vessels . These ranged from starfighter - sized cannons to turbolaser - sized weapons similar to those used by the New Republic . These magma weapons ranged from small openings , with the capability of blaster cannons , to large emitters , which could shoot flaming rocks the size of small starships over great distances . The Koros - Strohna ' s weapons were spaced sporadically and recharged slowly as new magma was produced , though they proved fantastically accurate despite their unconventional technology . Another weapon was the huge , tubular worm called the dread weapon , which extended from the bowels of the worldship . The dread weapon could be used to gather nutrients for the worldship to stay alive . The Gorros ' Fen served a similar function . Complement . Additional defense came from the worldship ' s cargo and troop holds which could transport more than 5 , 000 warriors along with Coralskippers and planetary vehicles . Due to the vehicle ' s size , the Koros - Strohna could transport a small Yuuzhan Vong army . Life - cycle . A Yuuzhan Vong worldship lived for an average of 500 years or more . However , they could live up to twice that long , as the Baanu Miir proves ( see history for more about the " Bannu Miir " ) . When a worldship started to near the end of its life - cycle , it would develop color variations on its Dovin basal s , and it would grow Myogens in its corridors . History . In 26 ABY , the worldship " Baanu Miir " held twelve thousand Yuuzhan Vong , and was nearly 1000 years old ( an age considered ancient ) , dying and no longer able to travel faster than light . It is unknown if these figures were systemic for all worldships . The " Baanu Rass " , one of the largest worldships , was 120 kilometers across , almost the size of the first Death Star . During the trek through the intergalactic void between galaxies , it was known that certain drugs were circulated into the worldship ' s interior , which infused its incumbents with a sense of purpose and belonging in order to prevent them suffering mental breakdowns resulting from the stresses of a long journey across space to the Promised Land . The " Alak Schou " was one of the worldships used to transport the invasion force into the galaxy . The Domain Hul worldship served as a base for the Yuuzhan Vong assault against the New Republic during the attack on Borleias .