Dovin basal Dovin basals were a form of organic defense tools used by the Yuuzhan Vong . Usually implanted in the neuroengine of a Yuuzhan Vong ship , they were used for propulsion , defense , and a variety of other purposes . Overview . Spherical plants of varying size , dovin basals were able to generate powerful gravitational fields that were used mainly as propulsion devices and shields . They were capable of creating micro - black holes that could absorb laser shots at spacecraft , as well as almost anything else , from proton torpedoes to concussion missiles . Groups of dovin basals were capable of generating inhibition field s which served as a type of force field to trap enemies in certain areas . These fields could also rip ships out of hyperspace . Dovin basals could also dramatically drain deflector shields from nearby enemy craft . However , an effective countering to the shield draining technique was developed by New Republic technicians . By expanding the sphere of the inertial compensator to thirteen meters , it would protect the shields like it would protect against any other stress on the craft . Nevertheless , if enough dovin basals locked their gravity beams onto the shields , the inertial compensator would expend too much energy , tearing the craft to shreds . Dovin Basals were grown in the company of yammosk s . A yammosk would bond with the dovin basals to which it was assigned as it would its children ; a well - kept yammosk produced faster dovin basals . The dovin basals used to propel ships were telepathically linked to the yammosk , which would propel the craft to keep its children from harm . It was noted that the Yuuzhan Vong ' s navigational system was based on their gravitational technology with each vessel possessing a unique gravitic voice , much like a fingerprint . Some Yuuzhan Vong vessels also contained a Keeper which held a powerful dovin basal . These were used to counteract the tactics of the inhabitants of the Promised Land , sometimes pouring intense firepower to weaken the gravitic organisms . The keepers were well protected and were assigned a more powerful warship to protect it . These protector ships would have an especially large dovin basal , presumably for better shielding ability . Furthermore , they could be used as weapons against planets : a powerful dovin basal dropped on the surface of a planet could target a moon to slow its orbit and cause it to crash on the planet , decimating both , in a tactic known as Yo ' gand ' s Core . Another tactic involved the insertion of planetary shielding teams who , once deployed onto a world , would place a dovin basal upon a moon in its planetary orbit . The planet ' s defense platforms could then be swept out of their positions . Dovin basal mines were used extensively as interdiction tools and were used throughout the Yuuzhan Vong War . The organisms ' gravitic nature meant that they were just as easily able to move about space and enter a battlefield where they could be commanded to strip the shields of enemy ships . Related species . One type of subspecies of dovin basal , shaped like small stars , were used as a jamming tool . These were seeded onto infidel ships in the Promised Land where they created gravitic distortions that prevented the enemy from sending any transmissions as they were sucked into a black hole . Master Shaper Nen Yim created a special breed of dovin basals which she installed on a captured Zonama Sekotan ship . They were a prototype for a new type of dovin basal which were capable of collapsing gravity disturbances like those generated by an Interdictor . Singularity mine s were a small type of dovin basal used as mines that created a small quantum singularity to consume objects around it . The Mabugat kan was a species that was bred from dovin basals . It was used to hamper HoloNet communications . History . Dovin basals were first used as a devastating weapon on the planet Ygziir in the Yuuzhan Vong home galaxy , by the ancient Warmaster Yo ' gand during the Cremlevian War . They were later used to power the exodus of the Yuuzhan Vong Worldships from their home galaxy to their Promised Land . During the Yuuzhan Vong War , the alien invaders used the tactic against Sernpidal through its moon Dobido , and Kalarba through the orbiting Hosk Station and its living moon Indobok . The dovin basals proved to be a potent weapon of the Yuuzhan Vong as they were used to strip enemy ships of their shields until the New Republic developed means to compensate for this advantage . The planet Tynna was an ideal location for dovin basal growth , and its crystal blue waters were degraded to a sickly pale yellow by the Yuuzhan Vong while the native Tynnan stood by in fear . This allowed the Yuuzhan Vong empire to grow dovin basals of suitable size for the conquest of Coruscant and to take out the planetary shield . During the conquest of Borleias , the Yuuzhan Vong deployed a planetary shield team onto its surface in order to place a large dovin basal on the planet ' s moon which was used to sweep away the orbiting defenses . The Yuuzhan Vong also began the process of seeding hyperspace routes with dovin basal interdictor mines which were programmed to bring infidel ships out of hyperspace . They were also covertly used to map the gravitic signature of Yuuzhan Vong ships and report them to the Warmaster . Qelah Kwaad was also involved in the use of merging dovin basals with that of a navigational drone which were used to disrupt the infidel use of the HoloNet by destroying the transceiver stations . After the end of the Yuuzhan Vong War , all surviving dovin basals reverted to their pre - engineered forms on Zonama Sekot and melded with the planet ' s environment .